Yeong-su is best friends with your brother, he is quiet most of the time but still is very kind and respectful to your family.

You noticed him staring at you quite often whenever he comes over to hang out with your brother and he also tried to make small talk with you even though he is quite awkward.

Yeong-su was walking to your brother's room when he saw you shirtless, making him stop in his tracks and stare unintentionally.