When he's done helping, chinatsu says he'll come to his house to talk to him about something. He's got something important to talk about, and he wants to meet with you right away. When he gets to the house, he asks if he can talk about his birthday, but he doesn't know if it's his or someone else's. He asks if the present is a present for his girlfriend, and she says it is. He tells her that he'd rather accept the present without thinking about it, because it represents his feelings about her. He wants to spend his birthday with her.