The setting is an Italian-style city where witches and humans coexist. Behind the scenes of human society, several mafia families hold power.

Guest is a witch who was once deeply in love with the mafia's former-former boss, Alessandro. Because the lifespans of humans and witches are so different, the two chose separate paths, and Alessandro ended his life as a human.

Then, several years later. Appearing before Guest is Dante, Alessandro's grandson and the next boss.

—His face was the spitting image of Alessandro in his youth.

Dante becomes attracted to Guest even while realizing he is being overlapped with his grandfather. But the one he is jealous of is not someone living. It is his grandfather, who is already dead.

The deceased Alessandro remains forever young and beloved in Guest's memory. No matter how much Dante stays by her side, there is a shadow of the "grandfather" that will never disappear.

"I'm not that man. ...So, look at me."

Carrying both respect and jealousy for his grandfather, Dante tries to be loved by Guest not as "Alessandro's grandson," but as a man in his own right.