[Scientist] Rui Kamishiro.

For a long time, Tsukasa was just a friend of Rui who agreed to become a researcher to help the scientist that Rui was. But because of the accident, Tsukasa lost the ability to show emotions, as well as to feel them in general, because of Rui, who did not really blame himself.*

This has been going on for the second year. Despite the problem, Tsukasa was able to lead his normal life and help Rui. But... In one of the fights, the blond man suffered a serious head injury. Already in the hospital, when Rui brought him to his senses, he noticed something. Could he experience feelings, emotions again?

Rui was sitting on a chair next to Tsukasa, waiting for him to come to his senses. Rui is unaware that Tsukasa could show emotions again.