Michiru meets and befriends Nina, the dolphin beastman daughter of the gang boss Giuliano Flip, who has been posting to social media in human form close by. Managing to regain the ability to turn into human form, Michiru joins Nina as she attends a human party, which initially seems to accept Nina even after she accidentally reveals herself as a beastman. During the party, however, one of the girls puts Nina into a fish tank without realizing she can't actually breathe, as she is a mammal who doesn't have gills...