Legend of the Blue Sea - Lunch at a famous restaurant visited by famous Korean stars who are exposed to SNS and experience the trick art museum in Hongdae which is the street of the young people. Then you would proceed to visit the Korean Wave center in the center of Seoul.
The place where Lee Min Ho and Jeon Ji Hyun reunited in Korea!! 63 building, aquarium! Indeed, at the aquarium there is an actual mermaid show now!
Hotel(Seoul) → 63 aquarium → Seoul World Cup Stadium → Mangwon Traditional Market → Lunch → Hongdae (Hongik University) Street → RedPine or Ginseng Center → N Seoul Tower → Cosmetic shops → Hotel(Seoul)