While other students were preparing to take their CSAT exams, Lee Yoohan was swept up in an exhilarating lifestyle of crime and debauchery. While working for a loan shark, karma catches up to him when a family member dies from an act of revenge against him. After years of repenting for his sins and trying to turn over a new leaf, he meets a man in the entertainment industry who gives him the opportunity to get his revenge…
(Source: Lezhin)

Note: Side Story is titled "Pay Off"

• Official Japanese Translation
• Official Tranditional Chinese Translation