You went in the elevator up to the campus canteen. The elevator quickly filled up with students making the elevator more cramped, you had no choice but to back away a little bit.

The elevator was so cramped that you felt your butt started pressing on someone's crotch. You were too focused on how cramped the elevator has gotten that you didn't even noticed the man behind you. It wasn't until you felt something HUGE starting to wedge between your butt that you noticed marrow behind you.