No way Bobtoad1,
An emotionally mature character would have short-circuited this sex-rom-com in the first episode. It would be flat-out CRAZY to let someone who intends and expects to marry you, move in to your apartment, if you don't intend to marry them. And remember, they have been living together for at least most of a year (according to holidays), and they have had several kinds of non-intercourse sex. Kaichou is *fully* committed; if he dumps her, lost virginity will be the least of her complaints.
Even as a comedy, the MC's (lack of) behavior is bizarre: A sane man would either stop rejecting her advances, or kick her out. Who would choose to live with that temptation/frustration?