Kang-su warmly advises Gyeol to show his pain rather than hide it. Eun-ae introduces Gyeol to her psychological counseling app, "Mind Post Office," comforting him and encouraging him to open up about his hidden scars. Meanwhile, after discovering a shocking court document about her father's past, Seung-ri spots Dong-pal plotting another voice phishing scam. She secretly tracks him and reports him to the police.