After Minho saves Taemin from a stranger on the streets, Taemin is set on repaying Minho's heroeic deed. Minho, however, just wants Taemin to forget about it. However, with Taemin's persistent attitude, he will not give up that easily on his hyung.

Meanwhile, Taemin's friend, Jonghyun, transfers to a new school to turn his life around. He begins to fall for a new, and rather clumsy, upper classmen. Then comes his attempts to win the older's heart.