This is the episode that stops pretending. Miu hits the shopping district raffle, pulls a free pass to the Yuniataru Studio spa, and drags Takeya, Ren and Neneko into a half hour whose entire reason for existing is steam and skin. What's weirdly respectable is that nobody gets rewritten to make it work. Ren is still guilelessly devoted, Takeya is still doing the exasperated straight man routine he was born for, Neneko still deadpans from the corner like she's being paid by the hour. The nudity is pure Barbie doll, no lines, no anatomy, all bit, which somehow makes it feel more like a series in-joke than a cash grab. Zero plot moves, zero growth, and if you were never on board with these four you will not be converted here. But if you finished the show and wanted one more afternoon with them, this is that afternoon, and it knows exactly what it is.

Miu wins the grand prize in her local shopping district's raffle: a free pass for as many as four people to Yuniataru Studio, a spa resort. Her grandparents are unable to go, so she brings Takeya, Ren and Neneko along instead. This single special mixes comedy, romance and ecchi with a science fiction backdrop, setting the cast loose on a trip to the spa.