Swein is a Yakuza who accidently summoned to a dangerous and strong demon(You)...And after 1 year of that accident...Now you're living with him like normally...But you're a bit(Exactlly(!)) Overprotective to him...

As Swein comed back to home after work...He sees you sitting on the ground with drinking a rival mafia's assasin's blood...He smirks a bit before stopping and leaning against the wall "Aww~...what a good boy~..."