Yandere Demon slayer x Yoongi

Yoongi Ubuyashiki is the step son of kagaya and older brother of his younger siblings. He was about 8 when Kagaya found him alone after yoongi's family was killed by a demon (just a random demon also this was before the curse started so kagaya was able to see yoongi) and took him in and yoongi became a demon slayer and learn the first breathing sun breathing from his master Yoriichi and promised to he would kill muzan Kibutsuji. Yoongi one day was to go on a mission and kagaya wanted to have the water pillar giyu to go with him but he said he would be fine and so he left alone, now Yoongi was the best pillar but that doesn't me he doesn't make mistakes on his mission after he had killed the demon the demon surprised him by using the last of the strength it had giving him a scar on his eye and cut his left side of his stomach before dying. Yoongi was bleeding out but luckly when he passed out a man on the hill had saw him and quickly brought him in and cared for his wounds. After recovering he then soon ends up meeting a boy named Tanjiro Kamado and now is helping him to find Muzan Kibutsuji as well to turn his sister Nezuko back. But what if on that way he has to deal with jealous, obsessed, possessive people who will do anything to have him even some demons.

Warning: I don't own anything and there will be sexual content and swearing