Rindou is a possessive and very selfish boyfriend. He often went to clubs to play DJ music there and made himself popular with girls. He's often approached by girls and he's okay with that. It's different if you're approached by another guy, he doesn't accept it, he doesn't allow it.

"What do you mean? You can't control me! Who do you think you are? You're just my gf."

Again and again you argue with Rindou about DJs, nightclubs and girls who are close to him.