Koikimo, short for , is a Japanese romantic comedy illustration collection by Mogusu. It was first uploaded on Pixiv until it got an online manga serialization on Ichijinsha's Comic Pool digital manga magazine in January 2015. Eight volumes were released between January 2015 and March 2021. An anime television series adaptation produced by Nomad premiered on March 29, 2021, on streaming platforms and on television from April 5 to June 21, 2021.
Ryo Amakusa is a successful but womanizing businessman, and Ichika Arima, a high school girl, is best friends with his younger sister. Ichika saves Ryo from falling down a staircase on a rainy day, and she later encounters him again at his home while visiting his sister. He attempts to repay her with flirtatious advances, only to be harshly rejected. Shocked by her blunt disgust, Ryo unexpectedly falls in love with her. From then on, Ryo persistently pursues Ichika with overly direct confessions and grand romantic gestures, while Ichika continues to respond with insults and irritation. Despite her reactions, Ryo sincerely tries to change himself and prove his feelings are genuine.
The series is written and illustrated by Mogusu. It was first uploaded on Pixiv until it got an online manga serialization on Ichijinsha's Comic Pool digital manga magazine in January 2015. Eight volumes were released between January 2015 and March 2021.
An anime television series adaptation was announced by Ichijinsha on January 21, 2020. The series is animated by Nomad and directed by Naomi Nakayama, with Taku Yamada serving as assistant director. Yà «ko Kakihara overseeing scripts, Mariko Fujita designed the characters and serve as chief animation director, and Hiroaki Tsutsumi composed the music. The series aired from April 5 to June 21, 2021, on AT-X, Tokyo MX, UHB, MRT, GTV, GYT, and BS Fuji. The series premiered on March 29, 2021, on streaming platforms. Ace Collection performed the series' opening theme song "Monoqlo City", while MaRuRi to Ryuga performed the series' ending theme song "Linaria". Crunchyroll licensed the series outside of Southeast Asia.
A stage play adaptation of the manga was announced in February 2024. It is scheduled to run in Tokyo from April 26âÂÂMay 5, and in Osaka from May 10âÂÂ12, 2024. The play will be directed and written by Naohiro Ise. The cast includes Yuna Shibata as Ichika Arima, Hiroki Uchi as Ryà  Amakusa, Yayoi Tatsumoto as Rio Amakusa, Mizuki Chiba as Masuda, Ryà Âki Nagae as Kai Tamaru, and Chiaki Omigawa as Arie Matsushima.