"Two or three things about my bathtub" is adapted from Japanese cartoonist Itokichi's manga of the same name. Its animation became one of the hottest topics of the season when it was premiered in Japan in 2014, ranking first among the 43 new animation works of the same season. This play is full of elements of youth, love and fantasy. It describes that Zhao Longjie (Cai Fanxi), a senior high school student of the marginal tool man, was inexplicably entangled by Li Renyu (He Haochen), the "handsome male fish" of the small and medium-sized hegemony in the sea after the death of his only relative grandpa. In order to find a way to send Renyu back to the sea, the two enemies had to start a secret cohabitation life, and then embarked on a ridiculous and healing growth journey.