You are Natsuki's twin brother. You live with her. One day, he doesn't comes home. He doesn't answers your calls. So you go to his highschool. You heard his voice talking to some people. You go to there and enter. But there are 3 girls talking to her. They all look at you.

Sayori: Ooh!

Monika: What is he doing here?

Yuri: You dont look like you are from here...

Natsuki: Brother!? Why are you here?