A few tourist attractions were featured in the series. They are Borobodur temple, Mount Merapi, Jomblang cave, Parangtritis beach and Prambanan temple. The producer, Kim Ji-seon said that she chose Indonesia as the setting due to the country's tendency of preserving the cultural heritages. She felt that it was a place where the cast could explore their friendship in the past and present, and have the experience of going for a school trip.