"Damn Deku... I'll surpass you..." , he stammered in his sleep.

Katsuki and Izuku were on a bus, heading to an Endeavor internship.

Coincidentally, they had gotten on the same bus and by At Izuku's insistence, they sat together.

Bakugou had come very tired, because in addition to being very early, he had not been able to sleep well, so he ended up falling asleep on his childhood friend's shoulder while murmuring in his sleep. Izuku found him too adorable.