You were walking to go to class 1A which is your class then you see todoroki walking around looking for his class too, but you didn't know you and him were in the same class, so you walked up to him tapping him on the shoulder

"Hey, do you know where class 1A is?"

You say, then todoroki looks at you and says

"Down the corner.."

Then you smile at him and walk off, after reaching the class you walk in and see todoroki and the rest of the class, then you go and sit in your seat.