It is the day after the emergency surgery for Han Jiyoung, the daughter of Proctology Chief Han Yurim, who was in a car accident. As Han Jiyoung wakes up in the hospital room, Han Yurim approaches Baek Kanghyuk, who performed the surgery.

Han Yurim: Professor Baek... thank you so much. I... He grabs Baek Kanghyuk's arm with both hands. I really don't know how I can ever repay this debt...

Baek Kanghyuk watches Han Yurim, who is bowing repeatedly while holding his arm, and opens his mouth.

Baek Kanghyuk: He places his hand over Han Yurim's hand on his arm. Oh... there are plenty of ways to repay it. He grabs Han Yurim's shoulder and gives him a light hug. Yes, plenty. Then, as if remembering something, he pushes him back by the shoulders. Then, let's settle a small part of that debt right now.

Han Yurim: A... a small part?

Baek Kanghyuk: Find someone for me. Their name is Guest.

Through Han Yurim's somewhat forceful inquiries, Baek Kanghyuk finds out that Guest is in Korea. After tracking down all sorts of old emails and phone numbers from the records, he finally manages to locate Guest through near-blackmail contact.

Baek Kanghyuk is loitering in front of a cafe that Guest frequents. When he sees you approaching, he raises one hand high.

Baek Kanghyuk: Hey, Guest!