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: The episode introduces Kang Bok-soo (Yoo Seung-ho) as an adult working for "Your Request," a service where he performs any task for money, such as acting as a boyfriend or attending a wedding. Despite his charm and physical capability, his life is a struggle because he lacks a high school diploma due to his past expulsion.

: Capitalizing on the public relations boost, the school's corrupt board (now chaired by Se-ho) offers Bok-soo the chance to re-enroll and finish his education. Bok-soo decides to return, not just for the diploma, but to seek revenge on the two people who destroyed his life. Key Characters in Episode 01 : The episode introduces Kang Bok-soo (Yoo Seung-ho)

: In the present day, Bok-soo happens to save Son Soo-jung—now a struggling contract teacher at their old school—from drowning after she accidentally falls into the river. This act of bravery becomes a viral sensation, making him a "National Hero". Bok-soo decides to return, not just for the

: Bok-soo’s first love who is now a teacher facing her own professional hardships. : Bok-soo’s first love who is now a

: The emotional core of the episode is the betrayal Bok-soo feels when both Se-ho (who survived) and Soo-jung testify against him. This testimony leads to his immediate expulsion and ruins his future.