A-Sen is a notorious problem student at the Hua Ying Technical School. He’s a bully to peers and a total rascal in the eyes of his teachers. One day, when A-Sen was caught stealing class funds by a drillmaster, he, who usually acted recklessly, finally showed a cowardly side. Seeing A-Sen crying and begging for mercy, the drillmaster, after threatening to call the police, was overcome by deviant lust. He pulled out his long-awaited manhood and this time, not only did he want to teach A-Sen a lesson, but he also wanted to make him pay back double for his mockery and humiliation of his peers...