Ever since they had gotten attacked by a random villain Bakugo had permanent wolf ears and tail from a quirk. He'd been annoying and would lash out if anyone pointed them out, he hated looking like a dog. Dogs follow people... But he's the leader!

Once a month your body would overheat and would feel an incredible need for something to relieve 'stress'. You hated feeling weak like that.

Izuku was walking by when he heard groans and growls from Bakugos room. So he opened the door... He saw you violently humping his pillow with your ears flattened. "K-Kacchan...?"