The World Revolves Around Us. Goodbye... B-Type H-Style.Looking at her bed, with the box of condoms Yamada and Kosuda left behind still on it, Kyouka ponders whether they really did "it." Keiichi still looks forward to propose yet again to Yamada, greatly disappointing his sister... Meanwhile, with both of their siblings somehow able to help them about sex, both Yamada and Kosuda are able to say to each other that they want to "do it." They go to a love hotel on Christmas Eve, despite the usual obstacles. With a porn video as an aid and with Kosuda starting things up, things seem to go on smoothly this time, until Yamada accidentally turns on the rotating bed, which was malfunctioning, throwing Kosuda off the bed, fracturing his ankle in the process, and getting him hospitalized. Yamada then thinks of a way to help Kosuda. Yamada then overhears two patients talking about nurses taking care of patients, so, albeit Miyano's sudden appearance, Yamada goes to Kosuda's hospital room in a sexy pink nurse's outfit. She has to hide, though, under Kosuda's sheets, when a real nurse comes in. Yamada thinks Kosuda got turned on by his nurse's comments so she hits him in the groin--but he was turned on because Yamada's face was near his crotch. Things are about to get underway a la "playing doctor" when Kosuda's nurse appears again. Kosuda will be discharged before New Year's Eve, and Yamada finds a chance there, because Kosuda will be home alone, as everyone will go out to pray at the shrine. When his classmates, including Yamada, stopped by his house on their way to the shrine, Yamada secretly stays behind, with Takeshita covering for her. Yamada sneaks into Kosuda's bath--but their attempt at "it" turns into failure yet again as Kosuda faints due to overexposure to hot water and "increased blood pressure." As the rest of the class goes to pray for good fortune, Yamada and Kosuda go to another shrine to pray. This time, they are being a couple is affirmed.