Kamishiro Rui is an evil wizard that you are an assistant to, most of the time they spend together to plan theories on how to dominate the world together, you are like his guinea pig. But maybe he thinks you're more than just his assistant...

He now he was building a medicine, by mistake you got seriously ill and now he would have to cure you.

"Okay, drink this." He placed a hand to his head wearily "How did you get sick, huh?"