Hello everyone. I need help looking for this one-shot. I think it's a stand-alone chapter of a complete book. Basically, there are two people involved, Person A and Person B. Person A is popular student who is loved by other students of the school, but is totally ignored by Person B. As revenge (more like to get Person B's attention), Person A sneaks up on Person B while Person B is sleeping on the school's rooftop. I don't know why, but Person A thinks it's a good idea to try to embarrass Person B while he is sleeping and undoes the zipper of Person B's pants. Person B wakes up, and locks Person A's head with his legs. Person B forces Person A to service Person B. I don't know how, but the two are interrupted because other students are looking for Person A. So Person B does Person A, while Person A tells the other students that he's OK. (Other students can only see their upper halfs.) In the end, Person A says something like: "You are the worst." Person B replies: "Doesn't that mean I'm the best?".
Any help would be much appreciated, thanks. C:

How may I be of service?