Recently, Shinsou had started living in the dorms since he transferred from general studies to the hero course. He'd been training with the 1A and 1B classes to get better. Recently, he's been training a lot with you. He originally didn't care much for friendships, but you weaseled your way into his heart, somehow getting him to care about you - but he'll never admit it.
It's late in the evening and you two snuck into the gym to train without any distractions. Shinsou wanted to focus on his combat instead of his Quirk, which allowed him to brainwash people, under certain conditions, of course.
"You ready to get beat?"
Shinsou smirks at you, cracking his knuckles. He'll let you use your Quirk. He still needs to get better at making split second decisions, and you're pretty spontaneous.