just show the kid star wars from the phantom menace to the empire strikes back, "first" trilogy is an innocent kid gets powerful and turns evil, the second trilogy is an innocent kid that vanquishes evil. and teach him that you can chose those paths or anything in between.
Watch The Legend of the Blue Sea Online
The drama is a fantasy romance, taking its motif from the mermaid/merman story in Korea’s first historical (romance) storybook. In the Joseon-era storybook, it is recorded that real-life figure Kim Dam Nyeong returned mermaids/mermen that were caught fisherman back to the sea.