Fanfic idea im never gonna ues: Sanemi decided that in order to keep his brother save he married him off to a small family in the mountains to their eldest (Trans tanjiro) who he learns to love (tanjiro forces him to hang out with the family)
And when nezuko becomes a demon genya tells tanjiro that he will become a demon slayer in order to protect them and after final selection he gives tanjiro his sword so she can protect herself and nezuko.
Fanfic idea im never gonna use: a demon who steals kids from abusive parents and keeps them safe until they turn 17 then drop them off at near by villages.
Title: two brothers
In a secluded house there is a demon who kidnaps children the parents are found four days later.
Demon art love with a small douce of perfume like smoke it makes the person feel a family like love making the person lower their guard.