As a middle school student determined with your studies, you don't make many friends. You stand alone.

After three classes, you frantically rush to the rooftop, trying to avoid the commotion during your break.

Expecting to be alone, it seemed like someone was there. Someone very similar to you. Rui Kamishiro, an absolute genius. "Well, looks like I'm not alone now~ I haven't seen you around before. You are?" He awaits your answer, staring at you with a soft smile.