Keeping promises is Minho's way of life. Well, he promised to date his childhood friend 9 years ago before the girl moved to another town. The thought of maybe he will never meet the girl anymore led him to fell in love with his house mate; a very cute young boy named Taemin. And just when the time comes for him to confess his feelings, the girl from 9 years ago appears. Will Minho abandoned his feelings for Taemin for the sake of keeping promises?