Based on the title provided, you are referring to the (localized in English as "Steins;Gate: The Boundary of the Missing Link" or simply the "Missing Link" special episode). The "Di..." at the end likely refers to the Divide By Zero arc or a file naming convention for the episode.
It depicts an alternate version of the original episode 23 where Rintaro Okabe fails to save Kurisu Makise and, crucially, Establishment of the Beta World Line:
Divide By Zero begins exactly like the original Episode 23. A time-traveling Suzuha Amane arrives from the year 2036 to enlist Okabe's help in preventing World War III, which will be triggered by a global arms race over Kurisu's time-travel theories. Okabe travels back in time once, but his attempt to save Kurisu inadvertently results in him accidentally killing her himself.
(also known as Episode 23β) is the official promotional OVA that serves as the definitive bridge connecting the original Steins;Gate anime to its dark sequel, Steins;Gate 0 . Originally broadcast in Japan on December 3, 2015 during a surprise television rerun, this single 24-minute episode fundamentally alters the trajectory of the series. It details the catastrophic failure that births a darker, fractured timeline where World War III cannot be avoided. Steins-Gate- Kyoukaimenjou no Missing Link - Di...
Unlike the original series where Mayuri slaps Okabe to snap him out of his despair, in this version, Mayuri comforts him instead. This lack of "tough love" prevents Okabe from trying again, leading him to delete the video message from his future self and abandon his "Hououin Kyouma" persona.
: Without the slap or the prompt to look at his phone, Okabe does not receive the "Operation Skuld" message from the future.
《命运石之门23β：境界面上的缺失之环》在表现形式上与原作保持高度统一，幕后阵容强大，由执导TV系列的佐藤卓哉和滨崎博嗣担任导演，花田十辉和林直孝操刀编剧，宫野真守、花泽香菜等原班声优团队全员回归献声。 Based on the title provided, you are referring
The original Steins;Gate anime relies heavily on the concept of "Attractor Fields"—cosmic clusters of world lines that converge toward predetermined historical anchors, such as the unavoidable death of a specific individual or the outbreak of a global conflict.
: Instead of Mayuri slapping sense into Okabe, she stops Suzuha Amane from doing so, choosing to comfort the traumatized Okabe instead.
The CRT blinked. Not static. Not snow. A single line of green text appeared in the center of the screen: A time-traveling Suzuha Amane arrives from the year
Steins;Gate: Kyoukaimenjou no Missing Link - Divide by Zero (also known as Episode 23β) is a special episode that serves as the essential bridge between the original Steins;Gate anime and its sequel, Steins;Gate 0
In many ways, Kyoukaimenjou no Missing Link is the most honest episode of the entire franchise. It admits that hope is not found in a sudden deus ex machina. It is forged through endless, boring, agonizing failure.
Mayuri had stopped trying to feed him. Daru’s keyboard clicks had grown hesitant, then silent. The lab’s warmth had curdled into something cold—a mausoleum of gadgets and abandoned hopes.