Hahamusume maruhi chijou: Kaikan meromero

Keiko, an insurance saleswoman, and her daughter Satsuki have a sister-like relationship. One morning, Satsuki says she wants to introduce her fiance to Keiko. However, this sparks a physical fight between the two. That night, after both being dumped by their boyfriends, the mother and daughter drink heavily to vent their frustrations, and enter a strange world in a suspicious alleyway.