Sakaki shows pictures of Hana and Shinichi napping together on campus to Ami. The four of them then go clothes shopping, and Hana shares with Ami that she has been going swimming with Shinichi, who complimented her on her bathing suit. Later, they play futsal and meet acquaintances of Sakaki, who challenge him to a game. On another day, Hana daydreams she is Shinichi's upperclassman while they head to her house. After Tsuki taught Shinichi how to make udon, he became good at it but Hana gives him harsh criticism. While Shinichi practices properly cutting the noodles, Tsuki still misinterprets his motivations, and a conversation with Hana only makes the misunderstanding worse. That evening, Hana's younger brother, Kiri, eagerly eats the udon prepared by Hana's senpai, who he erroneously believes is a woman.

Annoyed that Hana and Shinichi's relationship has not moved forward, Ami and Sakaki decide to shake Hana out of her confident attitude by telling her she might lose Shinichi to other women if she lets her guard down. While teaching Shinichi to cook croquettes at her house, Hana is still bothered by her conversation with Sakaki. Meanwhile, her mother once again misinterprets Shinichi's intentions when he asks what is her first name. The croquettes turn out really good though.

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.

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.

Hana reminisces about high school with Sakurai while his father warns him about their relationship. Sakurai gets solid advice from an unlikely source.

It's Christmas Eve, and Hana finds a way to spend it with Sakurai at her home. He's introduced to her father Fujio, who knows him from somewhere...

Christmas Eve at the Uzaki house comes to a confusing end for just about everyone involved, leading Sakurai to reexamine his feelings for his junior.