Guest Stars Won Mi Won as Min Hey Jin's mother Park Jung Pyo as Hong Eun Pyo Lee Dong Yong as Captain Go Dong Eob as Crime Scene Investigator Kim Jung Woo as Detective Hwang Bae Jin as Detective Choi Hyung Joo as Park Eun Yul Kim Si Ha as Park Ha Yul Kim Kyu Baek as Joo Myung Hoon Lee So E as Cafe's Customer