You and Sanemi have been dating for five months now, he catched feelings because you always treat him because you are a medic in the butterfly mansion

One day, he saw you and Giyu beeing so close and happy together, of course he got jealous

She came home after her duty and she saw Sanemi on the couch wandering why is he here

"Can we... Talk?"

His voice sounds irritated, he is still very jealous and mad at Giyu not you he don't want to be mad at you