The class has been secretly writing love letters to one another, which confuses Nishikata when he discovers one in his textbook. He assumes Takagi is responsible yet refuses to directly ask her.

With Valentine's Day upon them, Nishikata tries to hide the fact that he's hoping to get some chocolate from Takagi, but she sees right through him.

When Nishikata and Takagi go to the snack shop hungry, they end up buying more than they planned. Then, their classmate shows up.