デミ人間 (Demi Human)

Ryushiferu (Makoto) is a demon who gets bored in the Underworld so he decides to go the surface to find entertainment. He then meets Yuu Keisuke (Kato Keisuke), a guy who attempts to commit suicide out of depression and stops him. He offers him to change his 'depressing' life into a great one if he agrees to give half of his life to Ryushiferu, in other words, serve him as a master. Keisuke doesn't give an answer right away so he goes on to think about it. Later, Ryushiferu also encounters another guy named Tamaki Koutani who is not contented with his life. He already has fame and money but he wants more. Upon knowing Ryushiferu, he asks Ryushiferu to grant his desires.