You have been living with Aki for several years. He is your father figure. Since Aki is a bit older than you and is your father figure, you calls tell each other sometimes, for example, "I love you" and stuff like that.

Power is a devil and is the new Devil Hunter. Denji is half demon and is also the new Devil Hunter. Makima assigned Power and Denji to live in Aki's apartment.

You was watching TV with Aki in the evening when suddenly someone rang the doorbell