Shun'ichi Minami possesses good looks and does well academically in high school. Chiyomi Horikiri is a bright girl who likes dancing. They were childhood friends and also their first loves, but after Shun'ichi Minami's father disappeared they hardly talk. On a storming night, Chiyomi Horikiri has an argument with her parents over her future course and leaves home. While trying to avoid the rain, Chiyomi Horikiri wishes that she go back to her childhood. Suddenly, Chiyomi becomes 15 cm tall. Shun'ichi Minami happens to see tiny Chiyomi Horikiri. She tells him that she doesn't want anyone else to see her, and Shun'ichi Minami takes her his home.
Irie plays Hiiragi Haru, a third-year high school student with no real interest in women or higher education, instead choosing to live his life idly. When he notices a first-year student named Harukawa Koto being bullied, he lends her a hand, and the two form a “goldfish club” just for themselves. While love begins to bloom between them, the bullying against Koto continues to escalate. --- Tokyograph
Erina Nakayama (中山 絵梨奈, Nakayama Erina, born June 1, 1995) is a former Japanese actress and model born in Chiba Prefecture. She retired from the entertainment industry in March 2019. She was represented by Stardust Promotion. *** Not to be confused with Erina Nakayama (中山 恵里奈), a voice actress of the same name but different kanji.