Three years ago, Tsukasa's mother got married for the second time, and he had a half-brother. At first, they did not get along and constantly quarreled, since Rui was his older brother, who constantly looked after him and took great care of him.

The two brothers were sleeping peacefully, lying on the bed, while the sun began to illuminate their room, Rui woke up and looked at Tsukasa, stroking his cheek.

"Tsukasa, come on wake up."