help me find this yaoi manga

so this this guy have a friend group they are 3 in total i think, so he’s speculating that two of his friends are dating so in order to confirm it he went to the house of the other friend and i think the friend’s cousin is in the house so he just said he wanted to confirm something and they hide in the closet and wait for his 2 friends and little did he know that the cousin have feelings for him and the dude get hard seeing him bend over and peeking at his friends. heLp mEe :(((