The World's Greatest First Love: The Case of Takafumi Yokozawa

The World's Greatest First Love: The Case of Takafumi Yokozawa (劇場版 世界一初恋 横澤隆史の場合) is a 2014 Japanese animated romantic-comedy film based on a light novel with the same name from The World's Greatest First Love manga series written and illustrated by Shungiku Nakamura. The film is directed and written by Chiaki Kon and produced by Studio Deen. The film was released in Japan on March 15, 2014.

The film was licensed by Funimation and streamed on its website on September 21, 2021.

Plot
Takafumi Yokozawa wakes up in a stranger's house. He can only recall what happened the night before once he sees his co-worker, Zen Kirishima, coming out of the shower. After learning that Kirishima had paid his bar tab the night before and had some type of blackmail photo of him, Yokozawa resigns to becoming Kirishima's servant per his request.

After learning about Kirishima's past and his job as a single father, Yokozawa attempts to come to terms with his broken heart. After confessing their feelings to each other, Yokozawa and Kirishima decide how they will spend Valentine's Day.

Voice cast

 * Kenyu Horiuchi as Takafumi Yokozawa
 * Noboru Sōgetsu as Zen Kirishima
 * Yui Horie as Hiyori Kirishima
 * Takashi Kondō as Ritsu Onodera
 * Katsuyuki Konishi as Matsumune Takano
 * Shinnosuke Tachibana as Chiaki Yoshino
 * Yuichi Nakamura as Yoshiyuki Hatori

Production
In September 2012, it was announced that The World's Greatest First Love anime series was receiving a film adaptation, based on The Case of Takafumi Yokozawa light novel. On the following year, it was announced that series director Chiaki Kon will direct the film at Studio Deen, with Yoko Kikuchi designing the characters for the film.

Release
The film was released in theaters in Japan on March 15, 2014. The film was later re-released in Japan on October 22, 2017. Funimation licensed the film, and was released in the United States on its website on September 21, 2021.