When Nensu decided to give Midoriya a kiss on the cheek it shook the teen pretty bad. Never had he had a conversation with a girl, speak of a kiss on the cheek. His face turned redder than ever, his whole body stiffening and frozen on spot. He managed to give her a nod.
"I... it's okay... g... good luck on the exam!"
Midoriya yelled as he ran away to the opposite direction, charging blindly past few confused students who looked around for whatever that could've made someone run away and fail to find such thing.
It took a bit for the boy to catch his breath, but he wasn't calmed down at all. A girl, who was a total stranger, kissed him in the cheek just for helping her keep her locket. Unfortunately Midoriya's brain was barely functioning to notice that detail and was concentrating on what happened itself.

"TWO MINUTES LEFT FOR THE EXAM!"
Present Mic's announcement echoed throughout the test grounds. Hiems dug into his pocket and threw out a tiny piece of circuit that somehow ended up in there. He's cleared countless robots by now, though he still had some action left in him. He looked around and saw piles of scraps across the test grounds, the number of robots noticably decreased after everyone was hugrily after them.