yuki's Questions (2)

So here we are again. I need help finding yet another manga that I read a few years back. I should just start explaining the plot, shouldn't I? Yeah...... let's do that...

So,

Dude A likes Dude B but dude B has a gf or something like that and Dude A finds a book that tells the future and it was like, 'yo, your homie over there ain't gon' be yours, he gon' marry that one chick' and of course that inspires dude A to be like, 'yo, I gotta tell dude B how I feel before I fuck my life up 'n shit.' And then he got together with Dude B and was gonna tell 'em how he felt, but every time he tried to say it, something interrupted him and that's about all I remember.(⌒▽⌒)

I cant remember the name of this manga, but there is this dude A that meets this other dude, whom which i will call dude B. Dude A is into older guys so he puts a blindfold on while they are having sex. They fall in love with each other and whatnot. But it turns out Dude B was hired to keep Dude A occupied becuase Dude A was into Dude C, who found Dude A's love annoying. Can anyone help me? Please?!