When Oedo (Kenichi Matsuyama) casually asks Minato (Hiromi Nagasaku), “Want to go to the aquarium sometime?”, she instinctively says yes. Izumi (Yumiko Udo) immediately picks up on it and, through her own romantic filter, starts hyping up the idea of something between them. But Minato herself stays unsure, not quite able to take it seriously. Noticing she spends her days doing nothing beyond housework, Izumi tells her she needs “rehab for having fun” before anything else.

At the sushi academy, the final stretch of training begins with shrimp nigiri. Meanwhile, Tateishi (Shiro Sano) is fully energized, throwing himself into the academy’s bowling tournament.

At first, Minato has no interest in joining the recreational event. But Tateishi’s unexpected enthusiasm starts to rub off on her, and she slowly begins to open up to the idea of learning how to enjoy herself again. And then—she discovers an unexpected truth about Tateishi, a man who has stayed wrapped in mystery until now…