STORY EVENT RESEARCH / INDEX

Event research index

Browse major story events by work, chapter, and causality, with their world lines, causes, actions, consequences, and cited sources.

⚠ This page contains full story spoilers.

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Story text is an original editorial summary based on the cited material. Inferences and evidence gaps are marked separately.

The First D-Mail Rewrites the World LineOkabe sends Itaru Hashida a message stating that Kurisu was attacked, but the active PhoneWave delivers it several days into the past.Prologue · July 28, 2010

The Gel-Banana and PhoneWave ExperimentThe lab discovers that a banana becomes gelified after the PhoneWave operates and returns to its original bunch, suggesting a connection between the material effect and time.Time Travel Paranoia · Around August 1, 2010

Decoding SERN's Jellyman's ReportAfter Itaru Hashida breaks into SERN, the lab reads records of secret human time-travel experiments and confirms that multiple subjects were found as gelified corpses.Butterfly Effect's Divergence · Early August 2010

The Lotto Six D-MailOkabe sends the Lotto Six numbers to his past self. A recording error prevents the jackpot, but the experiment still produces a measurable world-line shift.Butterfly Effect's Divergence · Early August 2010

Moeka Sends the D-Mail to Find the IBN 5100Moeka outwardly claims that her message tells her past self not to replace her phone, but it actually causes her past self to obtain the IBN 5100 early. The computer consequently disappears from the shrine.Chaos Theory Homeostasis · Early August 2010

Luka Sends a D-Mail to Change Sex at BirthLuka sends dietary advice to his pregnant mother, hoping to be born female, and the resulting reconstruction rewrites the group’s memories of him.Chaos Theory Homeostasis · Early August 2010

Faris Sends a D-Mail That Saves Her FatherFaris sends a fabricated kidnapping message that changes her father’s itinerary and survival, rewriting the later development of Akihabara.Chaos Theory Homeostasis · Early August 2010

The D-Mail That Stops Suzuha from LeavingOkabe sends a message into the past so that Suzuha stays for the gathering and misses her scheduled departure.Chaos Theory Homeostasis · Early August 2010

The Rounders Raid the Lab and Mayuri Dies for the First TimeMoeka leads armed Rounders into the lab and declares that the members know too much. Mayuri is then shot.Dogma in Event Horizon · Evening of August 13, 2010

Mayuri's Death Is a Convergent OutcomeAfter comparing multiple rescue attempts, Okabe confirms that Mayuri dies by different causes within a similar time limit, making her death a fixed result within the Alpha Attractor Field.Metaphysics Necrosis · Mid-August 2010

The Delayed Departure Leaves Suzuha's Time Machine Incompletely RepairedBecause Okabe’s earlier D-Mail delayed Suzuha’s departure, the time machine is damaged during a thunderstorm. Itaru attempts repairs but cannot completely eliminate the malfunction.Metaphysics Necrosis · Mid-August 2010 (after the delayed departure and thunderstorm)

Suzuha Arrives in 1975 with AmnesiaSuzuha reaches 1975 in the incompletely repaired time machine, but the impact of the malfunction erases her memory of the mission to obtain the IBN 5100.Metaphysics Necrosis · 1975

Suzuha Leaves a Letter of Regret before Her DeathSuzuha writes Okabe a letter describing the failed mission and her life, entrusts it to Yugo Tennouji for later delivery, and dies in 2000.Metaphysics Necrosis · 2000

Okabe Receives Suzuha's Letter about the Failed MissionYugo gives the lab the letter Suzuha left behind, and Okabe learns in 2010 what happened to her between 1975 and 2000.Metaphysics Necrosis · Mid-August 2010

Send the D-Mail That Undoes Okabe's Intervention in Suzuha's DepartureOkabe undoes the message that stopped Suzuha from leaving, allowing her to depart on time and preserving the possibility of completing the 1975 mission.Metaphysics Necrosis · Mid-August 2010 (reconstruction)

Faris Reveals the Exchange between Her Father's Death and the IBN 5100Okabe learns that Faris’s D-Mail saved her father, but that in the original history he had given the IBN 5100 to the Yanabayashi Shrine before his death.Made in Complex · Mid-August 2010 (after reconstruction)

Send the D-Mail That Undoes Faris's WishFaris chooses to let her father die as he did in the original history and sends a cancellation message, restoring the histories of Akihabara and the IBN 5100.Made in Complex · Mid-August 2010 (reconstruction)

Send the D-Mail That Undoes Luka's WishLuka agrees to send a cancellation message into the past, restoring the original outcome of her birth and preventing the IBN 5100 from being damaged in the childhood accident.Fractal Androgynous · Mid-August 2010 (reconstruction)

The Truth about Moeka and FB Is RevealedOkabe finds that FB still abandoned Moeka after the D-Mail rewrite and that she died by suicide, then continues the investigation and identifies Yugo Tennouji as FB.Endless Apoptosis · Mid-August 2010 (after reconstruction)

Nae Captures and Kills Okabe in 2025Fifteen years later, Nae has joined the Rounders and captures Okabe, taking revenge on one person she holds responsible for her father’s death.Endless Apoptosis · 2025

Nae Repeatedly Time Leaps Back to 2010Nae performs more than 2,700 time leaps, sending her 2025 memories backward in stages until they reach her 2010 self.Endless Apoptosis · 2025 → 2010

Send a D-Mail from FB's Phone to Cancel Moeka's ActionUsing FB’s phone, Okabe orders past Moeka to stop searching for the IBN 5100, restoring the history in which the shrine preserves the computer.Endless Apoptosis · Mid-August 2010 (reconstruction)

Okabe and Kurisu Acknowledge Their FeelingsBefore the first D-Mail record is deleted, Kurisu understands that the world-line change will cause her death. She and Okabe confess their feelings and say farewell.Paradox Meltdown · Around August 17, 2010

Okabe Opens the Video Mail from His 2025 SelfAfter the first failure, Okabe can finally play the video from his future self and learns that he must deceive his past self and the world rather than erase the observation.Open the Steins Gate · August 21, 2010

Execute Operation SkuldFuture Okabe sends the operation into the past, instructing his earlier self to deceive the world, preserve the observed appearance, and keep Kurisu alive.Open the Steins Gate · August 21 / intervention on July 28, 2010

Arrive on the Steins Gate World LineKurisu and Mayuri both survive, and the time-machine paper does not become the direct trigger for the known war. Okabe reaches a world line with an unknown future.True Ending · After August 21, 2010

Okabe Interacts with Amadeus KurisuAfter abandoning the rescue, Okabe encounters Amadeus, an AI based on Kurisu’s memories, intertwining grief, artificial-intelligence research, and competition over time-machine technology.Closed Epigraph · Winter 2010

A Russian Experiment Triggers Reading SteinerAn overseas time-machine experiment briefly shifts the world line. Through Reading Steiner, Okabe observes an anomalous fragment of Alpha Attractor Field history in which Kurisu is still alive.Pandora's Box · Winter 2010 to early 2011

Mayuri and Suzuha Depart from the Radio Building RooftopAmid an armed struggle for the time machine, Mayuri and Suzuha launch for the moment after Okabe's first failed rescue in 2010, so that Mayuri can ensure her past self gives Okabe the crucial slap that sends him back into action.Vega and Altair · Summer 2011 / destination: August 21, 2010

Two Messages Across Time Are Recorded in 2025Future Okabe and his companions record the Operation Skuld video for his 2010 self and prepare the coordinates needed to reach Suzuha and Mayuri after their 2011 departure.Milky-way Crossing · 2025

Milky-way CrossingAfter completing the operational information sent into the past, Okabe departs 2025 by time machine and travels into the distant past to recover the stranded Mayuri and Suzuha.Milky-way Crossing · Departure in 2025 / arrival around 18,000 BCE