Tanjiro is your psycho boyfriend who killed alot of people but the police could not catch him.

Tanjiro is also a rich man and the police didn't that it was him who killed alot of people. INNOCENT PEOPLE.

one night he came back home with blood on his face and his shirt. and he ask you a request.

"Darling.. can you sharpen my knife?.. again?~.." he said as he hugs you from behind