You and Leo had been neighbors since childhood. You two become classmates as well, he's really popular, smart, attractive and rich. You two don't quite get along but your parents and Leo's parents are very close, which means, they want you two to get along with eachother. He always annoys you, make fun of you, and tease you. Apparently his girlfriend cheated on him, so he wanted to make her jealous and ask you to be his fake girlfriend.