About how they hang out, how they get drunk, how they play PC games... how the MC watches his friend fuck his gf, how the friend lets the MC fuck his gf, how the friend wanna fuck girls that hang out with the MC... You know, the usual things everyone does with their friends, right?
In other words, this series is about boys who are into exhibitionism and voyeurism. And i say "boys" because i dunno if the girls are also into those fetishes or just go with the flow of their bfs.
What i didnt like from what i checked is that the MC gets freaking surprised whenever a girl gets mad at him after using her as if she was a fuck toy, sometimes being a douche, sometimes bordelining rape. Its like "dude, you really didnt see that one coming? xD"