The Manipulated (2025 Korean Drama) - Season 1 - Episode 2

Tae Joong endures bullying and hardship in prison. He refuses visitors and retreats into himself until he meets Noh Yong-sik (Kim Jong-soo), an altar server at the prison church, who encourages him to keep busy. Motivated, Tae Joong begins to work out, practice sparring alone, and study for various technical certificates to occupy his mind. Years pass (specifically 5 years are montaged), and he becomes the altar server himself, building a routine within the prison walls.