18 Again (Season 1)

18 Again (2020) is a Korean fantasy romantic drama you can watch online on iFILM, directed by Ha Byung-hoon. Hong Dae-young is 37, broke, and about to be divorced — then he wakes up looking exactly like his teenage self.

Taking the name Ko Woo-young, he enrolls in the same high school his twin kids attend and gets an uninvited look at their lives from the inside. Lee Do-hyun and Kim Ha-neul pull off the trickiest part of the premise: keeping the comedy grounded in something that actually stings. The show's sharpest observation is not about youth being wasted on the young — it's about how little married people end up knowing each other.

Stream 18 Again online on iFILM if you want a Korean drama that earns its emotional punches without leaning on melodrama shortcuts.