This is one of those "forceful seduction" stories, mixed with the plot of a softcore porn and the typical hardcore BL sex scenes. If you're not down for that, or if you're looking for a deep plot, you won't like this.
The main problem is that Gino is written as a playboy who doesn't seem to care at all that Keito is rejecting him — not in a "I'm so into you I can't control myself" way, more like he doesn't understand (and even considers it juvenile) how Keito doesn't want only sex. Surely, an adult can comprehend that other adults seek different things? It's just bizarre, because it's not a language barrier issue either. The only explanation I can come up with is that it's supposed to be one of those "has to get hurt himself in order to understand that he hurt others" tropes.
The second problem is Masayuki's character, whom I had some sympathy for until the 4th chapter. The person below me explains more, but, suffice to say, his character ended up being wasted on a tired, unpleasant trope.
Look, this manga is about the sex. The plot is supposed to add a bit of angst and pining, nothing more. The art...you either love or you hate, as Akihisa has a fairly divisive style. It's good for a quick fix, but when I say it's about as deep as softcore porn, I do mean it. Expect nothing more.