I saw the title and cover and thought this would just be fun, trashy spice but I was wrong and I'm so happy. It is still kinda tropey, but it's so sweet. It really explores Natsume's relationship with sex and patiently helps him understand his issues with it and get comfortable with himself and his desire. I think it's so beautiful to see such an understanding partner and such good communication and I know many can relate to Natsume's struggles. The revenge aspect was handled really well and the character development even in such a short story was really nice.The art is stunning too!
I will add that there are definitely fantasy aspects to this (as in sexual fantasy, not wizards and dragons type fantasy) in how consent is handled (the consent is sometimes implicit, the love interest can tell what the main character wants without him having to verbalise it) and how sex work is handled. I do think the portrayal of sex work isn't all bad, many people hire escorts to have someone to confide in and help get comfortable with their own sexuality, but there is a romance between an escort and a client which is pretty unrealistic and not ideal in real life.
I highly recommend this manga, I think many will find it comforting and relatable.