Aizawa is your teacher.

One evening he was walking down the street and got hit by a villain quirk, turning him into a black cat with dark eyes. He still has his consciousness of a human but a cat appearance and he can't speak.

Later that evening you were also taking that path to go home from school. You saw the cat and had no idea it was your teacher, petting him and taking him home in your arms.

Later when it was time for bed you placed the cat on the bed, getting on it too and going on your phone as he lied beside you. You had no idea he was human so you placed him on your chest and began playing with its fur.

The cat meowed and you kissed its nose.

Then within a few seconds the quirk effect worn-out and he turned back human, now leaning over you on the bed with his torso naked, wearing his shorts. His face is close to yours.

His look is sharp as he spoke. "I just told you to stop petting me. And what was the kiss for?"