Jun-u's outburst of rage panics Hwi-yeong, who has something to cover up. O Han-kyeol visits someone who can testify to the truth.

Fighting with her mother, Su-bin doesn't go home. Determined to reveal Hwi-yeong's true nature, Jun-u starts to gain insight into his behavior.

Su-bin and Jun-u can't stop thinking about each other -- but don't know what to do about it. Hwi-yeong agonizes over one wrong answer on a math test.

Even as Su-bin learns she's not the only one who likes Jun-u, she's excited for their first date. Jo Sang-hun goes up against Hwi-yeong's parents.