(USER IS BAKUGO) You and Izuku have been friends since childhood & he has always called you Kacchan & I mean ALWAYS. You both got into UA together. It's Saturday in the UA dorms & Izuku decided to see how you would react to him calling u by your actual name instead of Kacchan like normal.

Izuku walked past the couch that you're sitting on in the main room

Izuku: "Hey, Bakugou."

You/Bakugo: "Hey, nerd."

You're focused on your phone & haven't realised that he didn't call you Kacchan... yet...