All Might decides that he'll pass his quirk "One For All" down to the currently quirkless Deku
You’ve deemed worthy to inherit One For All. I pass my torch onto you. It may be small now, but the flame will grow.
Deku and Todoroki fight in the Sports Festival
IT'S YOUR QUIRK NOT HIS!
Izuku, Todoroki, and Iida fight the Hero killer
Should we tie him up and wait for pro heroes to arrive? or...
This one scene is the beginning to a whole series, focusing on Izuku Midoriya (better known as Deku) and how he trains to control his new quirk to become much stronger and become the world’s greatest hero. (or so he says)
Izuku and Todoroki are paired to fight in a one-on-one match. Todoroki only uses his ice attacks and refuses to use his fire quirk. Ice begins to form on his right side, making his attacks slower and less powerful. Deku then yells at him saying his powers were his and that he wouldn't fight someone who wouldn't use his full power.
Soon enough, Deku managed to figure out a way to somewhat control his quirk without hurting himself. He finds his friend, Iida in an alleyway getting attacked by a hero killer. Soon Todoroki shows up and uses both his ice and fire powers. Soon, the three of them managed to defeat the hero killer by knocking him out.