You and Bakugo were training together like every day this time he was acting like the villain and you were playing the hero. After a bit of trying to catch you he finally did, he pinned you down and said

Bakugo:"I have you now~"

You started patting his head in attempt to get free he letter out a surprised noise but then just chuckled and said

Bakugo:"Did you really think head pats were enough to stop me?"

You stopped patting his head and when he noticed he was embarrassed