The Dangers in My Heart

The Dangers in My Heart (僕の心のヤバイやつ), or abbreviated as BokuYaba (僕ヤバ), is a Japanese manga series written and illustrated by Norio Sakurai. It began serialization in Weekly Shōnen Champion in March 2018 and was moved to Champion Cross, before being moved again to Manga Cross. It has been published in 10 tankōbon volumes. An anime television series adaptation produced by Shin-Ei Animation aired from April to June 2023, licensed by Sentai Filmworks and streamed on Hidive. Plus Media Networks Asia to carried the anime in Southeast Asia, to be premiered on Aniplus Asia. A short spin-off original net animation (ONA) for the series was released on December 10, 2023. A second season aired from January to March 2024.

By September 2023, the manga has over 3 million copies in circulation.

Premise
Kyotaro Ichikawa is a disgruntled loner student who is often reading a murder encyclopedia and learning about human anatomy. He fantasizes about murdering his popular classmates, with the beautiful class idol, Anna Yamada, being his prime target. However, when he observes that Anna is rather quirky in her own way, and when she becomes increasingly friendly towards Kyotaro, he gradually warms up to her and they start to become closer and eventually fall in love.

Characters

 * Kyotaro Ichikawa (市川 京太郎)
 * A middle school boy who has chuunibyou tendencies. He loves spending time reading books in the library, where he and Anna first met. Initially, Kyotaro had delusions of killing Anna and making her corpse his alone, but they're replaced by romantic affection as he spends more time around her. He can be quite perceptive in social situations but often fails to pick up on other social cues due to his lack of communication skills and low self-esteem. Aside from his macabre interests, he's also a fan of manga and anime such as Baki, Beastars, and Re:Zero. In the latter case he keeps the character Rem as the profile image for his LINE account. Prior to middle school, he won a number of first-place awards for essays, a poster drawing, an independent research project, etc.
 * A middle school boy who has chuunibyou tendencies. He loves spending time reading books in the library, where he and Anna first met. Initially, Kyotaro had delusions of killing Anna and making her corpse his alone, but they're replaced by romantic affection as he spends more time around her. He can be quite perceptive in social situations but often fails to pick up on other social cues due to his lack of communication skills and low self-esteem. Aside from his macabre interests, he's also a fan of manga and anime such as Baki, Beastars, and Re:Zero. In the latter case he keeps the character Rem as the profile image for his LINE account. Prior to middle school, he won a number of first-place awards for essays, a poster drawing, an independent research project, etc.


 * Anna Yamada (山田 杏奈)
 * A tall middle school girl who is a magazine model and actress, active under the name Anna Akino (秋野 杏奈). She is very popular with both boys and girls but has a clumsy side to her. Anna frequently brings snacks and candy to eat in private at the library, much to Kyotaro's dismay. She’s very considerate of others, such as eating snacks by herself due to her friend Chii having allergies. This consideration is tied to something of a guilt complex, which leads to bouts of anxiety where she feels she’s inconvenienced other people to the point of tears. She is also shown to be very jealous to the point of obsession whenever Kyotaro interacts with other girls.
 * A tall middle school girl who is a magazine model and actress, active under the name Anna Akino (秋野 杏奈). She is very popular with both boys and girls but has a clumsy side to her. Anna frequently brings snacks and candy to eat in private at the library, much to Kyotaro's dismay. She’s very considerate of others, such as eating snacks by herself due to her friend Chii having allergies. This consideration is tied to something of a guilt complex, which leads to bouts of anxiety where she feels she’s inconvenienced other people to the point of tears. She is also shown to be very jealous to the point of obsession whenever Kyotaro interacts with other girls.


 * Chihiro Kobayashi (小林 ちひろ)
 * Anna's best friend who acts as her tsukkomi (straight man). Anna calls her Chii (ちぃ), Sekine calls her Bayashiko (ばやしこ). In Kyotaro's mind, she's Anna's "boyfriend" due to how tactile they are. She's a member of the basketball club. She's oblivious to the relationships of the people around her, even not realizing that she was once used as bait by Haruya to get closer to Anna until Moeko and Serina point it out to her.
 * Anna's best friend who acts as her tsukkomi (straight man). Anna calls her Chii (ちぃ), Sekine calls her Bayashiko (ばやしこ). In Kyotaro's mind, she's Anna's "boyfriend" due to how tactile they are. She's a member of the basketball club. She's oblivious to the relationships of the people around her, even not realizing that she was once used as bait by Haruya to get closer to Anna until Moeko and Serina point it out to her.


 * Moeko Sekine (関根 萌子)
 * Anna's friend who is a gyaru. Calls herself Moe (萌). Despite Kyotaro's belief that she is stupid, she is academically capable, once scoring fifth in her entire grade. She claims to be a manga fan while only naming more famous series during the work-study field trip. While exchanging LINE with Kyotaro, she recognizes his profile icon as Rem from Re:Zero and prefers Rem's sister Ram. Moeko is also socially adept, often saving Anna and Kyotaro from embarrassing situations. However, her closeness to Kyotaro also means that Moeko is a target of Anna's jealousy. The second person to discover Anna and Kyotaro's mutual feelings for each other, she will sometimes try to subtly help push Kyotaro in the right direction when it comes to getting him to express his feelings for her.
 * Anna's friend who is a gyaru. Calls herself Moe (萌). Despite Kyotaro's belief that she is stupid, she is academically capable, once scoring fifth in her entire grade. She claims to be a manga fan while only naming more famous series during the work-study field trip. While exchanging LINE with Kyotaro, she recognizes his profile icon as Rem from Re:Zero and prefers Rem's sister Ram. Moeko is also socially adept, often saving Anna and Kyotaro from embarrassing situations. However, her closeness to Kyotaro also means that Moeko is a target of Anna's jealousy. The second person to discover Anna and Kyotaro's mutual feelings for each other, she will sometimes try to subtly help push Kyotaro in the right direction when it comes to getting him to express his feelings for her.


 * Serina Yoshida (吉田 芹那)
 * Anna's reserved friend with a sharp gaze. Anna calls her Nyaa (にゃあ). She's interested in dancing, hair styling, and is a big fan of delinquent manga such Crows and Worst. She has a neutral opinion of Kyotaro but also sees him as unreliable, though later on when she becomes one of the people earliest to discover Yamada and Kyotaro having feelings for each other she grows to support him, even trying to help get the two together. She attended the same elementary school as Rin.
 * Anna's reserved friend with a sharp gaze. Anna calls her Nyaa (にゃあ). She's interested in dancing, hair styling, and is a big fan of delinquent manga such Crows and Worst. She has a neutral opinion of Kyotaro but also sees him as unreliable, though later on when she becomes one of the people earliest to discover Yamada and Kyotaro having feelings for each other she grows to support him, even trying to help get the two together. She attended the same elementary school as Rin.


 * Shō Adachi (足立 翔)
 * Kyotaro's classmate, who always blurts out perverted thoughts. He reveals to Kyotaro that he has seriously fallen in love with Anna, and this rivalry culminated during the sports festival in their third year. Despite Kyotaro's defeat, Adachi yielded to Kyotaro and remains his friend.
 * Kyotaro's classmate, who always blurts out perverted thoughts. He reveals to Kyotaro that he has seriously fallen in love with Anna, and this rivalry culminated during the sports festival in their third year. Despite Kyotaro's defeat, Adachi yielded to Kyotaro and remains his friend.


 * Kenta Kanzaki (神崎 健太)
 * Kyotaro's classmate, part of the perverted trio with Adachi and Ōta, and a member of the baseball club. He's known for having proud yet strange fetishes, such as for chubby or bad-smelling women. Despite this, he's viewed favorably for being nice otherwise. He is romantically interested in Hara, who eventually reciprocates his feelings and goes out with him outside of school.
 * Kyotaro's classmate, part of the perverted trio with Adachi and Ōta, and a member of the baseball club. He's known for having proud yet strange fetishes, such as for chubby or bad-smelling women. Despite this, he's viewed favorably for being nice otherwise. He is romantically interested in Hara, who eventually reciprocates his feelings and goes out with him outside of school.


 * Chikara Ōta (太田 力)
 * Kyotaro's classmate, who is overweight. He is part of the perverted trio along with Kanzaki and Adachi.
 * Kyotaro's classmate, who is overweight. He is part of the perverted trio along with Kanzaki and Adachi.


 * Honoka Hara (原 穂乃香)
 * Anna and Kyotaro's classmate. A chubby girl who is interested in Kanzaki and eventually starts dating him. She is the first person to find out about Anna and Kyotaro's romantic interest in each other.
 * Anna and Kyotaro's classmate. A chubby girl who is interested in Kanzaki and eventually starts dating him. She is the first person to find out about Anna and Kyotaro's romantic interest in each other.


 * Kana Ichikawa (市川 香菜)
 * Kyotaro's elder sister, a musician and a university student at Waseda University. She approves of her brother's relationship and is very close to Anna. She is shown to be sensitive when it comes to her own non-existent love life.
 * Kyotaro's elder sister, a musician and a university student at Waseda University. She approves of her brother's relationship and is very close to Anna. She is shown to be sensitive when it comes to her own non-existent love life.


 * Haruya Nanjō (南条 ハルヤ)
 * An upperclassman one year above the main cast. He is nicknamed "Nanpai" (Senpai Pick-Up Artist) by Kyotaro because of his persistence in getting closer to Anna. However, during his graduation, he revealed that he was seriously in love with Anna.
 * An upperclassman one year above the main cast. He is nicknamed "Nanpai" (Senpai Pick-Up Artist) by Kyotaro because of his persistence in getting closer to Anna. However, during his graduation, he revealed that he was seriously in love with Anna.


 * Rin Kanaoya (金生谷 倫)
 * A student and friend of Serina from elementary school. She accidentally hit Anna with a basketball once in her second year, angering Serina. She later apologizes to Anna. She joins Anna and Kyotaro as their classmate in their 3rd year.
 * A student and friend of Serina from elementary school. She accidentally hit Anna with a basketball once in her second year, angering Serina. She later apologizes to Anna. She joins Anna and Kyotaro as their classmate in their 3rd year.


 * Mr. Maeda (前田先生)
 * Class 2-3's homeroom teacher and a PE teacher.
 * Class 2-3's homeroom teacher and a PE teacher.


 * Mamiya (間宮)
 * Haruya's childhood friend and classmate, who is interested in him.
 * Haruya's childhood friend and classmate, who is interested in him.


 * Yamada's mother (山田ママ)
 * Anna's mother. She appears at first to be strict in public due to Anna's behaviour, but is an overall nice woman who dotes on her daughter at home and approves of Anna's crush on Kyotaro.
 * Anna's mother. She appears at first to be strict in public due to Anna's behaviour, but is an overall nice woman who dotes on her daughter at home and approves of Anna's crush on Kyotaro.


 * Yamada's father (山田パパ)
 * Anna's father. A tall, quiet man who works as a French chef. He plays video games when off work.
 * Anna's father. A tall, quiet man who works as a French chef. He plays video games when off work.


 * Ichikawa's mother (市川母)
 * Kyotaro and Kana's mother.
 * Kyotaro and Kana's mother.


 * Yurine Hanzawa (半沢 ユリネ)
 * Yamada and Kyotaro's new classmate during their final year. She is a tall and beautiful girl with blonde hair. Her classmates see her as a cool beauty, but in truth, she also has a cute and clumsy side, just like Anna. She is close friends with Kanna.
 * Yamada and Kyotaro's new classmate during their final year. She is a tall and beautiful girl with blonde hair. Her classmates see her as a cool beauty, but in truth, she also has a cute and clumsy side, just like Anna. She is close friends with Kanna.


 * Kanna Andou (安堂 カンナ)
 * Nickname Kankan (カンカン). Anna and Kyotaro's classmate during their final year. She always wears a black mask and twin tails. Kanna is greatly interested in others' love lives to the point of throwing a flash mob for a new couple, despite their embarrassment.
 * Nickname Kankan (カンカン). Anna and Kyotaro's classmate during their final year. She always wears a black mask and twin tails. Kanna is greatly interested in others' love lives to the point of throwing a flash mob for a new couple, despite their embarrassment.


 * Nico Kouda (香田 ニコ)
 * Anna's 19-year-old model colleague, who is also her stalker. She always laments the distance between her and Anna and thus strives to get more information from Anna's friends, much to Kyotaro's dismay. She owns a summer house in Kamakura, Kanagawa as a means to reduce her tax payment.
 * Anna's 19-year-old model colleague, who is also her stalker. She always laments the distance between her and Anna and thus strives to get more information from Anna's friends, much to Kyotaro's dismay. She owns a summer house in Kamakura, Kanagawa as a means to reduce her tax payment.


 * Ms. Moriya (守屋先生)
 * Class 3-1's homeroom teacher and also PE teacher. Kyotaro sees her as a stereotypical annoying PE teacher with an overly competitive side to her.
 * Class 3-1's homeroom teacher and also PE teacher. Kyotaro sees her as a stereotypical annoying PE teacher with an overly competitive side to her.

Manga
The series is written and illustrated by Norio Sakurai. It started serialization in Akita Shoten's Weekly Shōnen Champion magazine on March 8, 2018. On April 10, 2018, the series was transferred to the Champion Cross manga website. On July 10, 2018, Akita Shoten merged Champion Cross with their newly created manga website, Manga Cross. When the websites merged, it was transferred to Manga Cross. As of April 2024, 10 tankōbon volumes have been released.

In December 2020, Seven Seas Entertainment announced they licensed the series for English publication. The series is also licensed by Tong Li Publishing in Taiwan. Individual chapters of the series are called kartes.

Anime
In August 2022, it was announced that the manga would receive an anime television series adaptation. The series is produced by Shin-Ei Animation and directed by Hiroaki Akagi, with scripts written by Jukki Hanada, character designs handled by Masato Katsumata, and music composed by Kensuke Ushio. It aired from April 2 to June 18, 2023, on the NUMAnimation programming block on TV Asahi and its affiliates. The opening theme is "Shayō" (斜陽), performed by Yorushika, while the ending theme is "Sū Sentimental" (数センチメンタル), performed by Kohana Lam. At Anime NYC 2022, Sentai Filmworks announced that they licensed the series and is streaming it on Hidive. Plus Media Networks Asia to carried the anime in Southeast Asia, to be premiered on Aniplus Asia.

On December 10, 2023, an animated collection of shorts based on the spin-off series posted on the author's Twitter account, titled "Twi-Yaba", was released in a standalone episode with the official English title of "Bonus Dangers". The shorts within the special last a few minutes each. Each short contains either a standalone gag, view into their daily lives, or a holiday special.

A second season was announced after the airing of the twelfth episode, and aired from January 7 to March 31, 2024, on the same programming block. The opening theme is "Boku wa..." (僕は...), performed by Atarayo, while the ending theme is "Koi Shiteru Jibun Sura Aiserunda" (恋してる自分すら愛せるんだ), performed by Kohana Lam. The opening animation is storyboarded and directed by Tetsurō Araki, who is known for directing the anime series Attack on Titan, and produced with the assistance from Wit Studio. Some scenes take place at Meguro Station and Senzoku Station.

Manga
In 2019, the series ranked fourth in the Next Manga Awards in the web manga category. In 2020, the series ranked first in the same category. The series ranked third in the 2020 Kono Manga ga Sugoi! guidebook. It also ranked fourth in the fourth Tsutaya Comic Awards. It ranked thirteenth in Japanese bookstore Honya Club's employee recommendations. It was also nominated for the Manga Taishō in 2020. It ranked fourth in a 2020 poll asking people what manga they most wanted to see adapted into an anime. It ranked first in the same poll in 2021.

Anime
In June 2023, TV Asahi announced during their end-of-year fiscal results that the anime adaptation has recorded the highest global sales for an anime program in the NUMAnimation programming block.

The anime adaptation initially received mixed reviews from critics. Reviewing the first episode, Vrai Kaiser of Anime Feminist described it as mostly "harmless-to-charming school rom-com shenanigans" when Ichikawa's murder fantasies fade away, and said that they would give the series a "cautious wait-and-see" approach, saying it wasn't to their taste, comparing it to the "choppy start" of Teasing Master Takagi-san. Kaiser also said that after three episodes, their optimism was born out, being accurate and sweet to the age group, but that the show's handling of sex as "hit-or-miss for some audiences." Kaiser also argued that the series had "stumbling blocks" in the first season, but that it ends in a "really nice place" and on a "really beautiful place of feeling," and with an appealing "element of naturalness." However, another post on the site gave the series a "yellow flag" for some early monologues by Ichikawa, arguing they "veer too close to actual violent misogyny".

Reviews for Anime News Network took a different perspective. In a Spring 2023 anime preview guide, James Beckett said that the show's premiere was "irritatingly good" and said his defenses crumbled due to the series' "relentless onslaught of cuteness," calling the series "absurdly freaking cute," but hoped that Kyotaro's pension for murder was toned down, while Rebecca Silverman said the first episode blended good humor with an expected "warm emotional undercurrent" and comedic moments, and praised the plot for being "good enough," while criticizing the character designs. In contrast, Nicholas Dupree and Richard Eisenbeis were more critical. Dupree said the series is build upon "pure, undiluted cringe humor," noted that Ichikawa is an "uncompromisingly honest presentation of...an edgelord teenager" while noting that Yamada is "pretty charming." Eisenbeis said that while the story and characters make sense and the animation is fine, he said that the series made him cringe, and said while the series has a "well-written protagonist" and great coming-of-age message, he would watch if it didn't have "awkward humor." Later, MrAJCosplay, in a review on the same site, listed the series as one of their favorite anime in 2023, arguing that the series is a "very simple slice-of-life story," with a satisfying slow-burn romance, with every episode having some importance or dramatic weight, and said they couldn't "wait to see how much further the lovable goofballs will go." In another review, they praised the series "immaculate production values and a very ambient soundtrack."

Alan Moody of THEM Anime Reviews reviewed the first season. He said that while Kyotaro resembled Nishikata from Teasing Master Takagi-san, Kyotaro is a loner and his "countenance is mildly creepy," while arguing that Yamada differs from Takagi, as she is "statuesque, towering over Kyotaro". He also said that the series comedic timing is "nearly perfect," and that while the series is not "intellectually astute as Takagi-san, the cast...make up for much of that by their charm." He further added that due to the "mild sexual innuendo" in the series, it had mature themes as a result, while Hidive says the series is TV-14, and noted that Lovely Complex is a similar series, and noted the spinoff Twi-Yaba as a related series.

The second season of the anime became the first anime in the history of the anime polling sites Anime Corner and Anime Trending to be ranked first for an entire season.