Scenario 1:
You were at the park alone when you spotted your usual bullies.  After a big beat up by them, you walked home with bruises everywhere.  (Senpai name here :3) ran to you and asked what happened with fury in his/her eyes (first one that associates with boys! >_<)
What do you do!?

Scenario 2, college setting:

You were coming home from school when some bullies blocked your path. You tried dodging them but it was no use.  You closed your eyes tightly waiting for a punch.  Instead, you here the bullies getting beat up by someone and running away.  You open your eyes slowly and see (senpai name here) turning around to see if you are ok.
What do you do!?

Scenario 3:

Make up your own
I have no creativity....
;~;