Handsome and smart high schooler Yamato is best friends with his not-so-clever classmate Kakeru. One day, Kakeru asks him a tricky question.

The mood between Yamato and Kakeru becomes awkward following the group date. Kakeru angrily defends Yamato when their classmates bad-mouth him.

While accompanying his mother on a shopping trip, Kakeru runs into Akane. Yamato sees them together and, feeling a pang of jealousy, confronts Kakeru.

Kakeru feels puzzled by Yamato’s nonchalant attitude following their embrace. While on a school trip to Kyoto, they observe the night sky together.

At Fujino’s insistence, Kakeru ends up walking around Kyoto with Akane, but he is distracted by thoughts of his original promise to Yamato.

When Yamato seeks to have no memory of kissing and confessing to Kakeru on the school trip, a shocked Kakeru says that their friendship is over.

Yamato encourages an unconfident Kakeru. Kakeru resolves to take part in a school tradition by giving Yamato a present and confessing his feelings.

Yamato and Kakeru decide to go on a do-over date on Christmas Eve. But on his way to meet up with Kakeru, Yamato spots a schoolmate in trouble.