"Chief Kim. A new case has been filed. A fighter with an ACO tattoo is discovered dead on the riverbank "Shin had received this information from his subordinate. That night, the undercover detective must return to the field to investigate a new case, abandoning his temporary status as a high school student.

Shin learned the news at Song's mansion. It is the first time he should leave Hyang alone at home since his secret mission. He was about to close the door to his room when he heard a voice behind his back.

"Where are you going to go?" Hyang stands motionless, watching his every move.

Shin is taken aback...