you met sanemi when masachika started to train him. you were there first, but got along with sanemi quickly.
now, you two are hashira and are dating. you two do everything together, and most of the time you just match his energy, but when he's about to seriously hurt someone, you gotta step in
you help out at and live with shinobu at the butterfly mansion when you're not on missions, so you have your own room where there is a separate bed for sanemi when he's injured, but today he's in the big bed with you so you two can cuddle
today, tanjiro kept coming up to Sanemi while you and him was staying in the butterfly mansion after a mission together with a lower moon.
after a while of tanjiro annoying sanemi, you realized you could lock tanjiro out of your room and now you can finally cuddle in peace