Welcome to Waikiki

Welcome to Waikiki is a 2018 youth South Korean television series starring Kim Jung-hyun, Lee Yi-kyung, and Son Seung-won. It aired on JTBC from February 5 to April 17, 2018, every Monday and Tuesday at 23:00 (KST).

On June 6, 2018, it was renewed for a second season, which premiered on March 25, 2019.

Synopsis
The story of three men who come to run a failing guesthouse called Waikiki. Complications spark when their guesthouse is visited by a single mother and her baby.

Main

 * Kim Jung-hyun as Kang Dong-gu
 * A short-tempered young man that resembles an "icon of misfortune" who dreams of becoming a movie director. Picking himself up after a painful breakup, he starts working again. He falls for Yoon-ah.


 * Lee Yi-kyung as Lee Joon-ki
 * The son of an A-list actor who wants to follow the footsteps of his father but is stuck in minor roles. He is very determined to make it on his own and would go to great lengths in order to land better roles. He is allergic to walnut. He eventually sees Seo-jin as a woman.


 * Son Seung-won as Bong Doo-sik
 * A kind-hearted but timid freelance writer who barely receives work. He currently works in a convenience store and whiles his time away writing a web story.


 * Jung In-sun as Han Yoon-ah
 * A single mother who ends up staying in the guesthouse with her daughter Sol in exchange for helping out. She makes the other residents uncomfortable with her quirky behavior and is prone to forgetting things and causing accidents. She initially wanted to be a rapper but later on studied in earnest to be a pastry chef. Afraid of trusting men again, she eventually agrees to be Dong-gu's girlfriend.


 * Go Won-hee as Kang Seo-jin
 * Dong-gu's sister who wants to be a journalist but had difficulty landing a job. Joon-ki calls her Chewbacca, later on shortened to Bacca. Her facial hair is a source of embarrassment and she has to shave it regularly. She falls for and starts a relationship with Joon-ki in but hides it from her disapproving brother.


 * Lee Joo-woo as Min Soo-ah
 * Dong-gu's ex-girlfriend, a famous model, who suddenly broke up with him. She ends up staying in the guesthouse when her new boyfriend ran away with all her money. She tries to make a comeback with Doo-sik's help.

Supporting

 * Kang Kyung-joon as Song Hyun-joon (Ep. 9–16)
 * Pastry chef, owner of bakery, instructor in Yoon-ah's school. In love with Yoon-ah.


 * Lee Jung-hyuk as Kim Woo-sung
 * Ryu Hye-rin as Jin-joo
 * Lee Ji-ha as Ji-soo's mother
 * Kim Ji-sung as Ah-young

Special appearances

 * Park Sung-woong as Park Sung-woong, actor   (Ep. 1)
 * Seol Jung-hwan as Lee Yoon-suk, Soo-ah's boyfriend (con artist) (Ep. 1, 2, 10 & 11)
 * Han Ji-sang as Tae Hyun, Seo-jin's college senior and first boyfriend (Ep. 2 & 3)
 * Go Min-si as Lee Min-ah, Doo-sik's co-worker (Ep. 3)
 * Choi Ri as Ji-min, Joon-ki's waxer (Ep. 3)
 * Kim Young-ok as Jang-gun's grandma (Ep. 4)
 * Lee Deok-hwa as Lee Deok-hwa, actor, father of Joon-ki (Ep. 4)
 * Jason Scott Nelson as Hostel Guest (Ep. 4)
 * Kim Seo-hyung as Kim Hee-Ja, actress (Ep. 4)
 * Jo Woo-ri as Sun-woo, daughter of Doo-sik's boss (Ep. 5)
 * Jin Ye-sol as Kwon Hye-jin, script writer who wanted to date Joon-ki (Ep. 5)
 * Jeon Soo-kyeong as owner of Waikiki Guesthouse (Ep. 6)
 * Wheesung as Wheesung, singer at wedding (Ep. 6)
 * Han Bo-bae as Yoon Mal-geum/Cherry, Doo-sik's first love, adult's movies' actress (Ep. 7–9)
 * Kang Kyun-sung as Kang Kyun-sung, actor playing masked octopus (Ep. 10)
 * Shin Seung-hwan as Min Soo-bong, Soo-ah's brother, UFC fighter (Ep. 11)
 * Tae In-ho as Kim Jae-woo, a producer at JBC (Ep. 11-12)
 * Kim Byung-se as Park Chang-ho, announcer (Ep. 12)
 * Yoon Se-ah as Dong-gu's university club senior (Ep. 12)
 * Jung Soo-young as Department store person
 * Kim Ki-hyeon as Min Ki-young, actor (Ep. 13)
 * Seo Yu-ri as Radio DJ Seo Yu-ri (Ep. 13)
 * Kang Hong-seok as Hong-suk (Ep. 13)
 * Shin Hyun-soo as Philip, model (Ep. 16)
 * Lee Ha-yool as Seo Jin-woo, actor (Ep. 16)
 * HALO as ASTAR, an idol group (Ep. 18)
 * Kim Kiri as MC Dacopy, rapper (Ep. 19)
 * Kim Jin-woo as Sol's father (Ep. 20)
 * Kim Ho-chang as Lee Sang-heon (Ep. 6)

Production

 * Ryu Hwa-young was first offered a major role, but declined.
 * The first script reading of the cast was held on December 18, 2017 at JTBC building in Sangam-dong.
 * On March 6, JTBC extended the show for four more episodes and aired two commentary specials in preparation for the extension.

Remake
A Vietnamese remake titled  aired in 2020 on VTV3.