This may be a little spoilery, but even as a long time yaoi fan I cannot in good conscience recommend this manga.
While the art and story is loads better than in some of Itsuki's other works, this started out with a lot of interesting potential, but in the end it took the low road. What makes that a deal breaker for me, though, is that the manga centers around the repeated rape and blackmail of a young boy who is already struggling with the idea of his sexuality and an unrequited crush on his (initially homophobic, later gay/bi) best friend.
However, his abuser isn't his best friend, but his upper classman in the same sports club that he's in. There's really nothing to downplay or "pad" it like there is in so much other typical ero-manga, and the rape is depicted as violent, unwanted, and mentally and emotionally damaging. The abuser is unlikeable and completely sadistic, who constantly reaffirms that he's only doing this to the main character because it's satisfying to hurt him.
But in the end, the abusive upper classman suddenly has an epiphany that he loves the guy he's been utterly tormenting, and of course said guy finds out, blames himself for everything, and runs to the arms of his upperclassman for a mutually loving, contented happy ending. No depth, no acknowledgment or awareness that this is really messed up, and character continuity casually thrown out the window at the last minute--it's just five chapter of abuse and heartbreak and then a sixth with a saccharine, romantic conclusion.
I can buy the idea of "rape fantasy", but this was handled so poorly that I found it unenjoyable and anxiety inducing, and I am not someone who is easily offended or turned off from darker subjects. Your dollar is better spent elsewhere.