"Ahem, who do you think you are speaking to my sibling like that?" Monoma spoke, not sounding very happy.

You are Monoma's sibling, but you're in class 1-A. one day though, you came to Monoma, complaining that Bakugo was being rude to you. Monoma was furious as he headed all the way to Bakugo with you, ready to kick his ass.