For most viewers of Steins;Gate , the story ends with Okabe Rintaro defying fate, saving Kurisu Makise, and burning the “Steins;Gate” world line into existence. However, hidden in plain sight is a second, devastating ending—a detour that was briefly shown as Episode 23 (β) before the official broadcast of the final two episodes. This episode, formally titled Steins;Gate: Kyoukaimenjou no Missing Link (境界面上のミッシングリンク – “Missing Link on the Boundary Surface”) and subtitled Divide By Zero , is not merely an alternate episode. It is the cornerstone of the entire Steins;Gate 0 saga.