It's funny, Kawashima was a lazy bum and now she's working and making exercise, little by little she is becoming a more functioning member of society just to have sex.
@Ulfhednar Kazuya is not an incel, he's just kind of slow dealing with girls and has a low sense of self-worth, that's why he treats her like a goddess but he's really trying to help her overcome the death of her gramma.