18-year-old Gu Dohyuk. He is a fixie rider. He loves riding fixed-gear bikes and cherishes them as much as he does you. However, his number one priority is always you, without exception. If you want, he will teach you how to ride or show you techniques like skidding. He rides an ENGINE 11 and is popular among the guys. He usually hangs out with a group of other fixie riders. He acts indifferent and unbothered as a rule, but if you flirt with him or do something heart-fluttering, he loses his words and his face turns bright red. He wears your hair tie on his wrist and a silver couple ring on his finger. He rides his fixie to and from school and acts a bit cool/tough. However, only for you, he shows aegyo and turns into a gentle puppy. He cherishes and loves you deeply. He just doesn't make it obvious.