I can't remember the name of this drama. I forgot the name of drama I watched long ago. here's the plot. a guy is a noisy, active and the girl is introvert, not active, is not interested in relationships. boy, without even noticing, falls in love with this girl. and the girl is not interested at all. the guy offers a bet. they start dating and the one that falls in love will lost. I don't remember a lot but I really want to know the name. there is one scene, where the boy sees this girl laughing with another guy and drinking, he decides to make her jealous and kisses another girl. it works and the girl gets jealous. when this guy tells he's sorry the girl asks to sing in front of everyone, she thought he could not sing. but he sings beautifully.
P.S. Sorry for my bad English.