Episode 21: It Was All Worth It

Having finished his conquest of the Demon Castle, Jinwoo makes his way to his mother's hospital room with the Elixir of Life in hand, at last collecting the true reward he set out to win. The triumph carries a shadow of doubt, as a nagging feeling lingers that he may have crossed into a realm never meant for him.

At the same time, Jinwoo faces strong pressure to take part in the approaching Jeju Island Raid. The operation represents a rare chance for further growth, yet the thought of his mother and his sister Jinah weighs on his mind as he considers the offer.

Jinwoo completes the Demon Castle and obtains the Elixir of Life, bringing it to his hospitalized mother as his ultimate reward, though he is unsettled by the sense that he has entered forbidden territory. He is also strongly urged to join the upcoming Jeju Island Raid, an opportunity for growth that forces him to weigh his ambitions against his concern for his family.

Titled It Was All Worth It, this episode adapts Chapters 88 through 91 and bridges the Return to Demon Castle Arc into the Jeju Island Arc. Shigeru Murakoshi wrote it and Yuya Horiuchi directed for A-1 Pictures, airing March 1st, 2025 in Japan and March 15th, 2025 in English, with the insert song REVIVER. The wiki had not yet logged a detailed summary or key points for this episode, so this entry is built from the published synopsis.