Koikimo - Season 1 - Eps 4: On This Holy Night
Ichika and her friends talk about romance in class as the time for Christmas and their school trip draws near. Ichika is asked what kind of guy she likes and tries to describe someone exactly the opposite of Ryo. However, Satsuki then points out someone who actually fits that description. Meanwhile, one of Ryo's coworkers hears him talking to Ichika over the phone and hears that he addresses her as "Ichika-san" as well as him telling her that he loves her...
About Koikimo

Title: Koikimo
First Air Date: 2021-03-29
Last Air Date: 2021-06-14
Status: Ended
Rating: 6.7/10 (from 46 votes)
Language: JA
Seasons: 1
Total Episodes: 12
Network: AT-X
Genres: Animation, Comedy
Production Companies: Nomad, Amusement Media Academy, AMG Entertainment, Mirai Kojo, TV Tokyo Medianet, Ichijinsha, Christmas Holly, Hokkaido Cultural Broadcasting, Miyazaki Broadcasting, Office Nove, C-One, Kanetsu Investment, BS Fuji, Toyo Recording, TS, BloomZ
Synopsis
One rainy day, salaryman Amakusa Ryo is saved by a high school girl he doesn't know at the station. He later finds out that the girl is Arima Ichika. Ryo is somewhat of a womanizer and to repay her for saving him, he suggests giving her a kiss or going out on a date with her, in which Ichika tells him he's creepy. This, however, opens a new door for Ryo and he falls madly in love with her. Ever since then, Ryo tries to overly express his feelings to Ichika. Ichika just keeps insulting him and says he's being creepy, but he just seems to take it as her way of showing affection towards him...
Cast

Yurie Kozakai
Ichika Arima (voice)

Toshiyuki Toyonaga
Ryō Amakusa (voice)

Rena Hasegawa
Rio Amakusa (voice)

Junya Enoki
Kai Tamaru (voice)

Kana Hanazawa
Arie Matsushima (voice)

Ryohei Kimura
Masuda (voice)