It was a bl about a sorta sub/dom thing going on but it was pretty much completely from the dom's perspective. Basically he kept pretending to be more experienced and crueler than he was and every time he'd leave the uke he'd just freak out internally like 'what am I doing holyshit why did I think that was a good idea 😕 ??' I think it was a highschool manga.
I think he primarily used his 'you cant touch me, im the one in charge here' thing as a way to hide how inexperienced he was. But they both end up kinda getting into it methinks XD;
Oh yeah, I think the uke was popular with girls or something?

tbh the first manga the crossed my mind when reading your description is the chapter 6 of Moero! Ii Otoko by Araya Miki, but idk whether it was the one you're looking for, so.

EDIT: i think it's Junketsu Drop ?

[img]http://i67.tinypic.com/2vbook7.png[/img]