It's basically a story of a bunch of sex friends who are (or rather, think they are) happy with their casual relationships. If focuses on two bisexual guys who are sleeping with each other. Each of them has a 'girlfriend,' and they're chill about what their bf's are doing together. The rest of it's all crazy drama as they all try to figure out what they really want out of relationships. [Hint: Maybe "going casual" isn't the best sort of relationship after all]
I rated it highly because it feels very real. It's like a soap opera. And when done right, that sort of thing can be interesting, as in this case. The characters have to travel a lot way and work through lots of fights and arguments and "acting out" to settle things.
If you want a nice, rosy story about sweet lovin' this isn't it. DON'T READ THIS STORY IF YOU LIKE PERFECT CHARACTERS. They are REAL characters. The kinds that make you want to shake them and slap them over the head. And there be lots of yellin' and slappin' and hurt feelings in here.
And if you only like "pure yaoi" (a.k.a. "no naked women") then you should probably steer clear too. Like I said, the guys are bi, they have their bedroom times with their gfs.
Notes to other reviews: Out of fan-translations I've seen, this is nowhere near the worst. Besides, what do you expect from unofficial translations you didn't pay a cent for?
And for the review about the abortion: yeah, the guy's a jerk; these are regular messed-up characters, and any way, you must not have read very far because SPOILER the gf lied about being pregnant so yeah, like I said...