It's about a lonely guy(gets married ltr) who is a boxer, and another who started practicing way before him. The ML has a black cat and a super crazy coach and many extreme opponents. It's a manhwa ig.
The boxer, found it .. Lol
The MC moves to a new house which has a residential female ghost with curves and long black hair. They also make a baby, originally the ghost's who died while pregnant. Also there is a priest. It's smut ofc
Maybe this one? https://www.mangago.zone/read-manga/lady_k_and_the_sick_man/
Ya, it just happened that after writing it i remembered the name . Btw thankyou...