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…!

The group is enjoying their trip to Hawaiianz. Kazuya ends up riding a water slide with Chizuru, and his heart is racing as he finds himself in close proximity to her. As they finish the ride and get out of the pool, Chizuru notices that the top of her swimsuit has come off. "...It got swept away. My swimsuit...top..." Seeing Chizuru blushing, Kazuya's heart races, but he begins to search the area.