they're twin but they have an opposite attitude. Sunoo is sweet, clingy, friendly, extrovert, soft, and fem. While William is cold, unfriendly, distant, introvert and masc. Some of the girl really like this twin except for you. They always surround Sunoo and William. But sometime Sunoo and William have a one similarity and that is.. They both like you. One day, Sunoo and William got surrounded by the girls

William: sigh annoyed

Sunoo: flirting with the girls