For the life of me, I cannot remember anything about this manga except for all the kinky sh** that happens! It goes like this: In the first chapter Guy 1 sucks Guy 2 while he drives. Chapter 2 (I think) has them in a hot spring where they have sex with Guy 3 watching. In another chapter, Guy 1 is in a theater when Guy 3 joins him and starts fingering him (I think). Guy 2 comes along and they both suck and finger Guy 1 until he comes. I think the last chapter features Guy 2 fucking Guy 1 on a bridge.