Looking for a yaoi manga title

Hi guys! I forgot the title but I have read it before here in mangago, back then i did not now how to tag and save it as already read so yah.. Is anyone of you knows this manga where there are 3 male friends involved in threesome, at first 2 of them are tops, the bottom is the small friend who has a girlfriend but is okay with the set up of the 3 friends, but later on it was revealed that one of the top (the biggest) likes the other top and the bottom knows it. So while the 3 of them are have sex the biggest suddenly enters the 2nd top so now they are having a chain sex (haha )
Yah those are what mostly I remembered, but I really like the plot, the story, the feeling but i forgot the title haha so please help out your gurl. Thanks(〜￣△￣)〜(〜￣△￣)〜