Revenge

Doyoung's parents died inside their house, the tragic happened when he was away home. He called the police but the police said that it was a suicide because of the note left in the crime scene. He couldn't accept that his parents committed suicide and had begun to research more about his parents' cause of death.

Later on, he found out that his parents' death was not a suicide but a murder, he made a vow that once he will find out his parents' murder he will take revenge.

[This is book one, Focus on Doyoung more]