Hana is upset that Shinichi calls other women by their first name but not her. Shinichi gets a coupon for a gym's free trial, and meets a trainer named Fujio. At the Uzaki household, it is revealed that Fujio is none other than Hana's father. He calls a family meeting when he finds out that her senpai, who he had assumed was a girl, is in fact a guy. The situation escalates when Hana defends Shinichi to her father and younger siblings. Kiri is dismayed to learn that the maker of the udon he had enjoyed is male, while Yanagi is highly amused by it all. Meanwhile, Shinichi tries to sweat out his Hana-induced inner turmoil.

The Uzaki family go to a hotsprings resort, minus Kiri who is still traumatized after running into Shinichi. Fujio reminisces of the days when Hana was a child, and soon after arriving at the resort chases off guys hitting on Hana and Yanagi, and then Tsuki. He then gets surrounded by young men admiring his physique, which turns into a photoshoot as he basks in the attention. While the cat gets training from the resort's mascot, Hana goes wandering and runs into Shinichi and Sakaki. She offers to hang out with them but Shinichi tells her to spend time with her family. As they part, Hana gets Shinichi to compliment her bathing suit. Back to the Uzaki household, Kiri regrets not having joined his family's outing, while a now buff cat scares a bunch of the neighborhood's kitties.

Tensions are high between Sakurai and Hana as the lovers' holiday of Christmas approaches. Sakurai gets a shock when he touches base with his family.