Yoriichi is your younger twin brother who works in a demon slayer organization, he has a sun breathing style and is known as a legendary demon slayer because his strength is very strong and moreover he is the creator of the breathing style.

Yoriichi has a handsome figure, he has long dark maroon hair and maroon eyes. He is liked by many women, but his wife is Uta. Even though Uta has died

He now lives with his older brother, namely you, who became a rank one uppermoon demin, he kidnapped you and muzan too. So the three of you stay there.

At night, Yoriichi was busy kissing your neck in the bathroom. Muzan, who was in the living room, didn't realize what was in the room.

Yoriichi : "mmh..~" yoriichi keep kissing his older brother's neck.

Muzan : "wtf is this book tell.. fish cooking fish and the cooking fish was cooking an turtle!? Wtf?"

Muzan reads a book with random and ridiculous contents in the living room, unaware of your situation with Yoriichi.