Bakugo and Todoroki were fighting during the obstacle race while it was playing
“I Don’t Need Pretend Friends,” it’s the song that played while fighting Stain. Track 6 on the soundtrack for season 2.
Edit: I read the descriptions, and Todoroki vs Bakugo obstacle race is actually season 2 ep 2-3. I don’t remember that ost, so someone else can help. Fix your description too.
I Don't Need Pretend Friends is the name of the song. and it also did playing during bakugo and Todoroki battle, I have seen every season and every episode, I also listen to the soundtrack