Start-up Season (2020 Korean Drama) - Season 1 (Episode 16 Added)
Last updated Sep 21, 2026
Season 1 (16 episodes, Oct 17–Dec 6, 2020 on tvN) introduces Dal‑mi’s scrappy climb from part‑time jobs to the Sandbox pitching arena. She mistakenly believes Do‑san is her first‑love pen‑pal; in truth, Ji‑pyeong wrote those letters. To seize opportunity inside Sandbox, Do‑san allows the misunderstanding to stand, sparking a tense romance as Samsan Tech’s fate and Dal‑mi’s ambitions collide. Meanwhile, In‑jae navigates corporate pressure at The Morning Group and a complicated bond with Ji‑pyeong, while family history parental divorce, step‑family dynamics, and old regrets shapes every rivalry and reconciliation.