Aizawa has always been a father figure to you, helping you train, helping you with homework, etc. since you’re father wasn’t in your life you grew close to him

one day you was talking to him whilst he was doing paperwork, asking his opinion on your new boyfriend, bakugou

“Why do you want my thoughts on it?” he asked “Because I care what you think” you replied “Why? I’m not your father” he said, not looking up from his paperwork as he continued to write