S1, E3: Of all days. The day Sang-shik decides to make his 10th confession of love to Hae-young, whom he's had a crush on for five years, Hae-young sees him hugging her next-door neighbor, Na-rae. Sang-shik begs Na-rae to clear up the misunderstanding, but when she explains to Hae-young, she hears a shocking fact... Meanwhile, Sang-shik prepares to confess his love. Will it turn out okay?