Sung

Kwon Sung is a student at Gunn High. Sung used to be bullied and beaten by his peers. He became best friend with Vinny after Vinny prevented him from committing suicide and told him to instead focus on changing himself. From then on, Sung stood up to his tormentors and refused to let others hurt him. Sung is more level-headed than Vinny and can think through situations, being willing to apologize and swallow his pride when necessary. He is loyal and cares a lot about Vinny, as shown when he went to Minu to ask him to let Vinny into their bike crew.

Sung is also dating Nica.

When Vinny went on a date with his girlfriend, he help set Sung up to a blind date with her friends.

"Change the courage you have to die into the courage to live on" -Korean version of what's written on the post-it note