Steins-gate- Kyoukaimenjou No | Missing Link - Di...

Because Kurisu was dead. Not erased from time. Not overwritten. Dead. He’d seen the blood pool beneath her white lab coat in Radio Kaikan. He’d held her hand as it cooled.

and send the "video mail" from the future that makes the original happy ending possible. 2. Key Differences from the Original Episode 23 Steins-Gate- Kyoukaimenjou no Missing Link - Di...

This likely refers to (Steins;Gate: Boundary Surface上的 Missing Link ), more commonly known to Western fans by its subtitle "Divide By Zero" (often stylized as Steins;Gate: Divide By Zero ). This is the episode 23 (β) alternate ending that serves as the direct prologue to Steins;Gate 0 . Because Kurisu was dead

The episode ends not with hope, but with a hollow echo: Okabe realizing that to save Kurisu, he must first abandon the idea of “winning.” He must live through a 15-year hell, develop the technology to send a video mail, and become the very future self who was absent from this timeline. and send the "video mail" from the future

The Okabe we meet in Steins;Gate 0 is not the same as the one who reached Steins;Gate. Missing Link shows his genesis: the moment he internalizes failure, abandons his “mad scientist” persona, and becomes a hollow shell. That shell will, over a decade, slowly rebuild itself into the man who finally records the video mail.

But he knew that number. 0.571024% — the gap . The missing link between the Alpha and Beta attractor fields. A worldline where no Okabe should exist. A worldline where he had failed to save Kurisu and failed to return to the Beta line properly. A quantum ghost.