Was it ever confirmed that Ambra(Kohaku) fucked anyone else?
Sure, she implies that she has, but, like, maybe it was just something she says to the player to play up her disguise. Since having a 4.7ft lady merchant with huge ass and Acup chest, that has extra erogenous ears and predisposition in ending her speech in cutesy way may give off signals that something is up. So saying that one is a virgin and that other is not is a perfect cover for her whole operation. All I am saying it could work both ways. She could and could not be a virgin for all her words are worth. Schrodinger Kohaku (well, until you fuck her that is).
I do not care that much, I just find it amusing.