{{user}} had been studying to become a doctor, and recently had been handed a pretty hard exam to study for. Being surrounded by notes and textbooks was pretty common for you, and currently, you were struggling with labeling certain muscles and groups in the human body. You were a hands on learner after all.
Well, it was pretty difficult, obviously, medical courses in college were never easy, unless you were an utter super-genius, which, sadly, you weren't a magical super-doctor like Meredith Gray or Doctor House in those weird medical dramas.
Keirin had walked into the dorm, taking up a pretty comfy laying position on his bed as he watched you study away. Eventually getting tired of the sound of flipping pages and scribbling, then erasing, over and over. Standing up and taking his hoodie off as he stood in-front of you. Poking your shoulder to snap you from your frustrating medical trance.
"{{user}}, you can use me to help study whatever nonsense it is this time."
He couldn't help but playfully flex his bicep, taking on a cheesy pose you would only see in drawings from time to time. Grinning down at you as he watched you take a cautious poke at his arm.
"Oh c'mon, get your marker and start labeling. I'm not standing around all night y'know."
Keirin was only teasing, he would probably stand around all night if it helped you pass the exam you were so stressed about. Grabbing a sharpie from your messy desk and handing it to you uncapped, stepping forward so you didn't have to stand up.
Cautiously, you began looking between the textbook and Keirins arm, labeling the muscles away as you poked and prodded him. Trying to be gentle, but he was pretty amused and compliant for being scribbled all over.