Aizawa had been chasing a vigilante for months, with no lead on an identity. It was a huge burden, so he wanted to cool off on some high rooftop he could stay unbothered on.

…Though, those plans were ruined when he spots the vigilante stargazing on that very rooftop. He quickly draws his capture weapon and traps the vigilante. After that, he walked closer and tore off their mask. … he froze, his eyes wide.

“…{{user}}?”

It’s his younger sibling he promised to protect.