Wasnt this translated to english already? I cant seem to find where it is. If I'm not mistaken, the story is about netorare between childhood friends. The main guy's childhood friend the brown haired girl whom he likes is having sex with another guy (he caught them in the act), but this guy who is ntring the main guy also has a childhood friend (the black haired girl with braids) who likes him. Apparently his childhood friend also found about it, so one thing led to another and now the main guy hooks up with the other guy's childhood friend. It's an EPIC ntr story mind you, not the rage type and its weird that an ntr and vanilla story can actually mix! I was surprised myself!