Can someone tell me the of the manga that I have read before?

It's in a high school setting and both are students and also the seme is originally straight but I'm not sure about the uke since it's been a while I have read it.

The seme is originally a playboy(?) or maybe has a lot of experience. The uke asked when the seme is going to stick it in but the seme just thought that s*x between two guys are thigh s*x and just rubbing out together.