There are two stories in this manga. Don't know why the synopsis is only written for the first story and not the other, but you should know that there are two couples in this manga.
That said, the reviewer below who gave this manga a 1/10 and called it "garbage" is really hyperbolic in his/her comment. None of the semes here are abusers or rapists or mean @ssholes. Not even close. They can be tsundere, yes, but most of the time, they are really sweet to their respective partner. In fact, I would say that they are extremely doting.
The one seme who "sleeps around" (which barely happens, btw) does it because he is gay and has an unrequited love for the uke (who he thinks is straight). He tries to maintain his distance by occasionally hooking up with other people. This is before anything even happens between him and the uke, so what's the big deal? How does that make him a "jerk?" He never behaves like a manwhore and "sleeps with everyone." Once he starts a relationship with the uke, the two remain faithful and kind to one another. So yeah, I don't know what the person below is even talking about.
This is a sweet and fluffy little manga. Not deep or complex, but in no way is it "garbage." I felt like I had to set the record straight for other potential readers. That comment below really is too much, and paints this manga in an unfair light. This manga is quite romantic, and the semes are really nice people.