I don't really remember, but I think it was a oneshot... Two friends went to an audition in hopes of becoming a band. They went to the bathroom and the seme started 'pleasuring' the uke. They later moved on to having sex on the urinals. Afterwards, a lady asked them why their clothes were all wrinkled. And they found out that a microphone was in their shirt that was thankfully turned off.
oh man.. ive read that before.. um.. let me think.. oh god.. this is gonna keep bugging me.. i'll look thru manga's i've read.. and then i'll see what i get..