No Yoomi, she is Yoonho's litter sister, who's popular with all the girls in school, especially Yoomi's classmates.
Yoomi is shy and isn't popular among the boys like her older brother. She prefers to be indoors and just watch cartoons or just stare at her laptop the whole day than spending a day outside.
She secretly likes her brother's best friend, Kwangji. She has been crushing on him ever since she was middle school but she never got the chance to tell how she feels
because she knew that he only thinks of her as a younger sister and she's scared that they might grew apart when she tells him.

Park Kwangji, he is Yoonho's best buddy ever since kindergarten. 
Kwangji is timid and most of the times caring like an older brother. He secretly likes his best friend's younger sister, Yoomi.
He has been crushing on her ever since he met her but he didn't want to tell her how he feels because he knew that she only thinks of him like an older brother and nothing more.
He was scared that he might not be able to teaser her around and talk to her anymore when he tells her.

Because I suddenly missed this cute guy, I decided to make a one-shot dedicated to him!
This one-shot is specially dedicated to my friend, Weijie~ I sarang you baobei! <3
Read and enjoy! ^^