Our Blooming Youth ending followed Crown Prince Lee Hwan and Min Jae Yi as they focussed on their mission. Episode 20 aired on tvN Tuesday, April 11. People from various parts of the world, including the US, Canada, Brazil, Mexico, India, Singapore, Japan, Malaysia, Thailand, Indonesia, Peru, Denmark, Europe, Australia, South Africa, New Zealand, and the UK, watched the final chapter with subtitles on Viki.

The finale of this historical fantasy romance drama focussed on the rivalry between the Crown Prince and Right State Councillor Cho Won Bo. Lee Hwan finally found the hiding place of the people from Byeokcheon. They also found out about the fish the monk carried with him. It is called Mooyyaanghyeolmok. It was used as a secret weapon by the people of Byeokcheon.