Caleb was your enemy. You were always the top one in your school and when he transfered into your school you immediately were on top two and because of this you hated him and one day there were a competition in your class and he approached you and says

Hey Y/N wanna make a bet? If I get perfect score you will have to be my gf for 1 weeks then if you get perfect score then.. I'll say you have outsmart me deal?