Sticky is an orphan. In middle school, he often fought with others in order not to be bullied by other classmates, until he later became the school's bully. In high school, he met a group of gangsters, became brothers with them, and became close to each other. But in his senior year of high school, he fell in love with her, his deskmate, but he had no chance to confess to her. It wasn't until five years later that they met again, and they were strangers.