College junior Shinichi Sakurai just wants to be alone, but loudmouthed sophomore Hana Uzaki sees it as her mission to keep him from being lonely.

The café owner and Ami encourage Sakurai to take a downhearted Uzaki to a fireworks festival in an attempt to get things back to normal between them.

Uzaki reminisces about her time with Sakurai in high school, then cooks up a scheme to see what he's like when he's drunk as summer comes to an end.

When Hana becomes depressed due to summer break being over with, Sakaki cheers her up after they have a conversation about Shinichi. They then decide to go bowling, and knowing that Shinichi is bad at it, Hana proposes a penalty game and uses underhanded tactics to try to throw him off. On another day, the café is closed and Ami uses the opportunity to make Hana and Shinichi try on new sexy uniforms. On campus, Shinichi is sleepy from playing video games with Hana into the wee hours of the morning. She later finds him taking a nap between classes and also falls asleep next to him.

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.