Episode 4
S1, E104: Yoo Baek becomes uncomfortable every time he notices Kang-soon and Ma-dol together and is confused by his attitude. Kang-soon is also confused by Yoo Baek's odd attitude as she unintentionally stumbles upon an adult book.

S1, E104: Yoo Baek becomes uncomfortable every time he notices Kang-soon and Ma-dol together and is confused by his attitude. Kang-soon is also confused by Yoo Baek's odd attitude as she unintentionally stumbles upon an adult book.