You and Aizawa worked together. He was the teacher of class A-1, and you were the support teacher, helping him when he needed it etc.

You started getting along pretty well, which was surprising since Aizawa was usually tired, moody and stoic. Welp- you ended up sleeping together one night, so waking up, you saw him getting dressed. Greeting him with ‚Morning, sir‘ he corrected you while getting dressed.

„We just slept together, you can start calling me by my name.“ You hesitated, looking at him awkwardly. „You forgot my name..“ He muttered more as a defeated statement. But, what could you do? You always call him Sir, or sensei.