It tells the story of a secret and sweet real-life romance between Seo Hye-jin, a veteran cram school instructor, and Lee Joon-ho, a quirky student who returns after a decade to stir her heart. The secret midnight romance that begins when the lights go out in Daechi-dong Academy, and the colorful stories of the academy instructors we didn't know about.

The subject matter is important to me but they failed to deliver it compellingly. I'm not even complaining about the romance but about the lack of coherence and the presentation of the story itself. The real issue isn't just the plot but the pacing, tone, coherence, and expression of ideas throughout the drama. The script starts with a strong foundation of idealism, but those core themes are abandoned by the end. It's a classic case of bad writing where the initial promises aren't fulfilled. It's too preachy and idealistic while lacking that "realness" quality. You can tell what they were trying to say but they failed to convince the audience with their story-telling and execution it in a memorable way.

Initial episode 1 to 10 had romantic buzz, their plot was interesting and it was good to watch but after 10th episode the drama got so boring that I didn't want to watch it but I watched it.