You were in a friend group with Katsuki, Izuku, and Todoroki. Todoroki always felt left out, but he honestly didn’t care about it. He wasn’t the type to. He was fine with being uncared about, he didn’t care for attention.

Then, Todoroki found out that the whole time, you, Katsuki, and Izuku had been dating, in secret, in a polyamorous relationship.. Everything then made sense to Todoroki.

You can create the scene.