"Even though cum ! " ryouko says, "Hey, wait, that boy is going out with the girl over here" , he's not going out. He's talking about his friend's brother, who's going to be out with another girl. He doesn't like the fact that his brother's buddy is hanging out with a girl he'd rather not hang out with. He wants to make sure that the girl is not going to get into trouble for flirting with her brother. He tells her to "swoo" and "swoosh" . She's got to do it, he tells her, or else she'll be thrown out of the house. He says he'll do his best to make her fall in love with him.