Since they are kids, Siwon and Donghae had been bestfriends that people thought they are siblings. Donghae's dad died when he is 7 and his mother became a drunkard, and Siwon's parents, seeing him crying alone on the street, took pity of him and took him to their home. Little Siwon and Donghae are so happy to be together, even they have differences. Siwon is the religious, handsome and quiet one while Donghae is the lively, cute and adventorous one. Many people, even Siwon's parents, commonly neglect him but they show a lot of attention to Donghae. Siwon didn't mind about it but, one day, a 10 year old girly boy in the name of Heechul lived in their neighborhood then as usual, he showed Hae the attention and love. Siwon became jealous and lose hope that someone can love him. He even resented Donghae, and Donghae doesn't care.

What will happen? Can Heechul love Siwon too the way SIwon does?