One night, Rui made a doll that looked like his friend Tsukasa. He inserted a paper heart in the doll as a joke, but little did he know..

The next day, morning at school. Rui had brought the doll with him.

Rui saw Tsukasa at the school gate, so he went to him. He hid the doll behind his back, as he was holding it gently. But, he accidentally touched the back of the doll's hair without noticing it, and.. Tsukasa, for some reason, felt it.