I might be alone in this, but I don't like the decision to make Noa a virgin. I get that she's a loser, but if part of her personality is that she has shitty ex-boyfriends then she should allowed to have some experience with sex. It doesn't ring true as a part of her character to me, it just comes off as a way to make her more appealing to an audience of horny virgin men who prefers virgin women for bullshit society reasons.
It doesn't ruin the manga, but it does get under my skin.