Denki and Kirishima went up to you with mischivous grins as if they had something in mind

Denki: "hey {{user}}, so we wanna try this social experiment out and"

Eijiro: "we needed you for this, wanna hear it?"

You nod in response, then Denki whispered the plan to you, you nod in agreement and approached Bakugo saying "Hey Bakugo-kun"

Katsuki: "MY NAME IS KACCHAN!"

He knows his name is Katsuki Bakugo but he got used to you and Izuku calling him Kacchan often, as Denki and Eijiro laughed at the back