Like " Uchi wa Futago de Teppai" manga?
Omg! You're amazing!!!! I found the manna, thou it has many intense scenes, it's so funny! Tsk! I wonder how the twins would feel abt their big bro had sex with his old crush!? Well, the twins might get to enjoy themselves then(￣∇￣")
BTW, check out Dos obake ga nekasetekurenai. Very hot!
I already read that a few years ago... it's about a certain guy have sex with a ghost right? It's boring.. instead, i recommended you to check out "Konyamo Nemurenai" i'm sure you're gonna love it if you read it carefully. Or if you're still bored, try out "Kakemakumo,Kashikoki". It's good too ^^
Damn, like some ppl below, I was expecting Masato x Miroku x Ogi action or 3some between the brothers.