Hikari is a newly expectant mother cohabiting with her boyfriend Taro. However, their relationship seems to be on the rocks. The couple has had trouble finding steady employment since graduating from college, and mounting financial problems further strain their relationship. Taro has a secret: he’s been relying on his eccentric aunt Kyoko, who has been acting strangely since losing her husband at a young age. Hikari’s first encounter with Kyoko does not go well, but Hikari visits Kyoko’s home unbeknownst to Taro and is introduced to a world where young women take part in bacchanals. This could spell doom for her relationship with Taro...