Based STRONGLY off of headcannons and is kinda sorta really sad

After years, years of learning to live with it, Yamada finally broke.

He had started off in a happy enough family, or rather, she had.

She loved her parents and they loved her, at least, until they figured out.

She... was a he.

They had kicked him out. He thought he'd die out there, cold and alone. Luckily, there was a light in the darkness, his saving grace.

He had been taken off of the streets by a kind woman who helped him. Kept him safe.

But that had to end.

She had died years later in a fire, a few months after he had met the love of his life, Shouta Aizawa.

Shouta had been with him, kept him safe, and Yamada did the same for him in return.

They were inseparable, even far into their careers.

They had gotten married. They were happy. Whole.

That's when Yamada broke.

Just randomly, in the middle of teaching a class, the dam just broke and he started crying. He tried holding back the tears, but it was all too much. Before he could stop them, they were cascading down his face and he was leaning against the board so he wouldn't fall to the ground. His students ran over to help him into his chair before one ran off to get Aizawa while the others tried comforting their teacher.

Yamada didn't hear them, he wasn't paying attention. He just cried and cried and cried. He let all of his emotions out, not even noticing when Aizawa ran in and took him out to the hallway to comfort him.

His husband pulled him into a tight embrace and waited for the blonde to finish crying.

The tears stopped soon enough and the two men sat there in silence.

That's when Hizashi realized.

Aizawa had died years ago.

It was another one of his nightmares.

His eyes fluttered open and he sat up, tears pricking the corner of his eyes.

"We can't seem to ever get a happy ending, can we?"