A secret and sweet real-life romance between veteran academy instructor Seo Hye-jin and her flirty student Lee Joon-ho, who returns after 10 years and stirs her heart.
After the lights go down in Daechi-dong, the untold stories of academy instructors unfold. The veteran instructor, Seo Hye-jin, and her former, rebellious student, Lee Joon-ho, encounter each other after a decade, painting a discreet and sweet real-life romance.