Child Body, Legendary Grandfather

In 1976, Martin Prescott, a nine-time world Go champion, stumbles upon Rupert and Noel playing Go while gathering wild greens. He takes Noel’s place for one game, only to find 49 years have passed in the mortal world. Noel grants him a peach, turning him back into a ten-year-old boy.

FunDrama released it as 73 bite-size episodes mixing marriage drama and secret identity, made to watch on a phone in one sitting or a few.

The draw here is a marriage that starts on the wrong foot and has to be earned. On top of that: waiting for the truth about who the lead really is to come out.

At roughly 1–3 hours in total, it's quicker to finish than most full-length series.

Start from episode 1 below; autoplay takes you to the next episode when one ends, and nothing needs a sign-up.