Sister Sister

Yuu loves Yayoi, but he never tells her his love. One day, Hazuki, Yayoi's younger sister, tells him her love toward him. He has no reason to say no, and they start to go out. On white day, he tries to hug her, but she runs away. The fact is Hazuki goes out with Yuu just to practice, and the ringleader is Yayoi. Finally, Yuu tells Yayoi his love, but she doesn't answer it and says, "Why don't three of us start from friends?" Their strange relationship starts....