It's not a good idea for a guy to get hold of a girl's contact info, especially when he's trying to flirt with her. This is especially true when you're talking about a girl who has a lot of male admirers. The girl in question is a friend of the protagonist's, and she treats the protagonist like a sister. The protagonist tells the girl that she treats her like her own sister, and that she's very important to her. The two of them have been going to the same cafe together, and the protagonist says that he'd like to make the girl happy somehow. After dinner dessert time, the protagonist gets his identity card back from the guy who took it. He's super excited to have it back, and he tells us that the guy was super nice to him, too, and even gave him some cake to eat after school. He says that now that he thinks about it, he wouldn't do anything like that in the past.