Our Blooming Youth Season 1 Episode 18

Seong-on finds out Sun-dol is acutally Min Jae-yi and feels betrayed. Meanwhile, Tae-kang tells Hwan everything about his secret. Hwan, Jae-yi, Myung-jin and Ga-ram takes one step closer to the truth and starts to track down the secret letter Min Ho-seung left behind, but another crisis hits them.