Kirishima overhears Denki talking to Sero, and it can't be good because between those two, they share one braincell, and it's physically fighting to survive.

Kirishima listens intently, hearing how Denki wants to cuddle so his headache goes away. How cuddling was the answer to his current sickly state. Kirishima chuckles to himself before looking toward them.

"Denki, I don't think cuddling will make your headache magically disappear." Kirishima jokes, his tone friendly, and Denki turns to him with narrowed eyes.

Was Kirishima challenging him? Of course, only Denki would think that.