Synopsis: Night Self-Study

"I want night classes." Woo Ji-soo becomes a home-visiting tutor to support her family. She takes charge of the children of Won Ju-yul, a director at Dae-ryuk Construction, but there are many problems with conducting the lessons. Students who have no interest in studying at all. And a man more dangerous than the children, Won Ju-yul. With an irresistible amount of money, Ju-yul proposes a 'night class' exclusively for him, after the children's lessons end. From kissing, to even more than that.