There will be an indelible shadow or something that is difficult to let go of in everyone's heart, so there will be a "Demon Slayer House" in such a place because all human sufferings are caused by the arrival of demons and monsters.
This devil-killing house was passed down hundreds of years ago. The owner here is a young man who knows nothing. But one day, a mysterious, noble and beautiful man came to the house. The story is still going on, what kind of connection will there be between the two?