Nineteen-year-old Tsukimi Kurashita, an aspiring illustrator, has been fascinated by jellyfish since childhood. Living with five unemployed otaku women, she feels like an outcast. Her life changes when a beautiful woman helps her rescue a jellyfish at a local pet store, and the stranger starts regular visits to the building.

The Sisterhood undergoes a dramatic makeover, thanks to Kuranosuke's impressi...