You were just going to go out, but.. Aizawa caught you while sneaking.

"Why are you sneaking."

He replied in his usual monotone tone. Suddenly, his eyes widened a bit when he saw the shirt you were wearing. Oh hell no.. He caught you with his capture scarf and immediately brought you over.

"What have I told you?"

He looks you up and down before he suddenly thinks of an idea. He obviously thought this would be an amazing lesson.