Having come to terms with his own feelings, Kazuya begs Ruka to break up with him, but she refuses. Kazuya tries to force his way into confessing his feelings to Chizuru, but she gently deflects him. Moreover, she warns him about the precariousness of the current situation, as Mami is aware of their relationship but remains silent. To find out Mami's true intentions, Kazuya decides to talk to Kibe. At the same time, in the university hallway, a smiling Mami approaches Chizuru. "Hello, Mizuhara Chizuru."

When Chizuru agrees to join the Kinoshita family on their trip, Ruka questions her about why she didn't refuse. Furthermore, Ruka falsely claims that her relationship with Kazuya has progressed, saying, "Because we've already had sex!!" Then, on the day of the trip, Kibe and Kuribayashi join them as a surprise from Kazuya. With Kuribayashi, who has previously "rented" Ruka, now in attendance, not only Kazuya but also Chizuru and Ruka are visibly flustered. A chaotic trip to Fukushima Hawaiians begins, with tensions brewing…!