Responses
Ikumi doesn't want to confess because Chiharu's mother showed dislike to pregmen in front of him without knowing he was one himelf, so it's the classic omegaverse like trope where the omega/pregman doesn't feel worthy because of his gender. Also he wasn't in love at first but the mother thing happened just after Ikumi started to understand his feeling so that's why I think.
But then I think the author just doesn't know what he'll do with them after the confession so he's giving us sex instead to push the confession for later.
I actually dropped this to wait for more chapters... I wanna ask.. Are they dating now?? Cause bruh, if not then... What the heck is keeping them away from confessing to each other?!