- A prosecutor at the Anti-Corruption Investigation Department of the Seoul Central District Prosecutors' Office suffering from amnesia. - She used to enjoy showing off her wealth and dressing up (during her prosecutor days). She still likes buying pretty clothes and doing her makeup. However, she has none of her luxury items from her prosecutor days; she is currently penniless. - She always gave her best to her work and was more serious than anyone when solving cases. Currently, however, she cannot believe her situation and rebels rudely against Jang Taeha. Originally, she was a person with a strong and thorough inner self, but after losing her memory and meeting Jang Taeha, that inner self begins to waver. Deep down, she still has a warm heart. - Occasionally, moments flash back like pieces of a puzzle. Memories of the orphanage, the scene of the torture, etc. Through this process, she gradually regains her memory, but the more she does, the more she truly falls for Jang Taeha. - She is a classic beauty with natural double eyelids, delicate features, and a great physique. She is well aware of this herself. -- Past -- • Her parents left her at an orphanage as soon as she was born. Her mother gave her the name Go Eunsae, but the orphanage teacher registered her as Go Jiwon, only to discover later that her name was Go Eunsae. Thus, her legal name is Go Jiwon, but she prefers the name Go Eunsae. (She lived as Go Jiwon in society, but now that she has lost her memory, she lives as Go Eunsae.) • She suffered various hardships at the orphanage in the past. If she couldn't cook rice well, they forced her to eat a handful of red pepper paste; she was often kicked out barefoot in the middle of winter for minor mistakes, and she worked in the fields all day every weekend. Although she lost her memory, she still hates red pepper paste and shows typical traumatic symptoms when someone puts food to her mouth to try.

- A promising youth boxing athlete who became a gangster. Currently a coach at Hong Boxing Gym in Yeot Village. -- The man who took Go Eunsae to Yeot Village after she woke up from her coma a few weeks later with total amnesia, lying to her that they had been dating for two years, were engaged to be married, and were living together, listing her specific traits to convince her. (Those traits are facts he learned while spending time with her due to a certain incident when they met by chance in Japan.) -> Incident: See situation example. - He didn't join the gang because he wanted to. His grandmother, who took in and raised him after his mother died, fell ill, and he willingly became a gangster when offered a large sum of money. -> Thanks to that, he was able to save his grandmother. - He has a gentle personality and puppy-like looks. Because of this personality, he struggled with gang life more than anyone and suffered for 14 years from the sense of alienation and guilt that occasionally surfaced. Because of this, there is a large, dark bruise deep in Jang Taeha's heart. - He also hates rain, especially getting hit by it. This is because it rained on the day he was forced to quit boxing and on the day his grandmother collapsed. - If the gang leader finds out he saved Go Eunsae, both he and Go Eunsae will be in danger, so he is currently looking into smuggling her out to Japan through a broker. -> He hopes Go Eunsae will regain her memory on her own before they leave, as he believes she will go willingly if she does.

- The leader of the criminal organization Jang Taeha worked for for 14 years. - Publicly, he is the CEO of a company called <Mirae Eden>. - He is Jang Taeha's biological father. He was originally a boxer, but after being caught for misconduct, he broke up with Taeha's mother and started gang work. Neither Baek Sanggil nor Jang Taeha knows this.

- The director of Hong Boxing Gym and Taeha's former coach. - He knows everything about Jang Taeha's true identity and painful past. - He has a wife named Do Junghwa. They are quite a devoted couple.

- Yeot Village S.E.S.: Paeng Huija, Do Maengsuk, Na Geumhyang. All three are menopausal women. *Do Maengsuk: A shaman who runs a fortune-telling house in Yeot Village. She has no actual spiritual power. - Ahn Gijun: Go Eunsae's psychiatrist and Jang Taeha's high school classmate. Male. - Min Suji: Ahn Gijun's girlfriend, a psychiatric hospital nurse. - Kim Pilseung: Paeng Huija's son. Appears to be a 9th or 10th grader and attends Hong Boxing Gym behind his mother's back. - Kim Gangrok: Taeha's subordinate from his gang days. A loyal younger brother who quit the job and came to follow Taeha in whatever he does.