A self-described mad scientist attends a lecture on time travel, stumbles upon the dead body of a familiarly unfamiliar woman, and discovers that his text messages are no longer bound by the rules of space and time.
Okabe is beyond shocked to learn that the girl he saw murdered is not only still alive, but much smarter than he expected. Later, the name John Titor sends Okabe into a frenzy, and another banana experiment yields bizarre results.
Makise pays an unexpected visit to the lab, much to Okabe’s dismay; however, her intrusion leads to further experimentation with the phone microwave, a device Okabe now believes to be a time machine.
Okabe must outsmart a maid in order to learn the whereabouts of an IBN-5100, an antique computer that may hold the key to deciphering SERN’s nefarious plan.
After some late night modifications to the IBN-5100, Okabe and his team uncover the shocking truth behind SERN’s many attempts to master time travel.
Makise figures out to the rules to the phone microwave, which is now known as D-Mail. Later, Okabe reluctantly adds a new member to the Future Gadget Lab staff.
Okabe takes his experimentation to the next level by texting the winning lotto numbers back in time, but he fails to consider how his actions might alter the present – or the future.
The latest experiment for Okabe and his lab mates leads to the disappearance of one of their own. Next, they’ll attempt to use their time travel technology to make a young boy’s dream a reality.
Okabe grows concerned over the drastic changes his experimentation is causing, and the IBN-5100 disappears from the lab. The only hope for finding a replacement rests upon the delicate shoulders of Feyris the cat girl.
The part-time warrior from downstairs tells Okabe about the search for her missing father. Meanwhile, the aspiring mad scientist is troubled by a mysterious text message.
As the lab members prepare to transport human memories by way of a Time Leap, Okabe receives some highly disturbing news: Makise may be a SERN spy!
Tension builds at the Lab when Makise and Suzuha both show up for the party, but that’s just the beginning. As the night draws to a close, armed thugs – led by a familiar face – come looking for the time machine.
Okabe, desperate to prevent the tragedy he’s already seen happen, summons the courage for a daring Time Leap. Can he save the life of his oldest and dearest companion?
Despite his many attempts, Okabe is unable to prevent the death of Mayuri, so he turns to Makise for help solving the riddle of time travel. Later, Suzuha’s true identity is revealed
Suzuha reveals the harrowing truth about state of society in the year 2036, and the lab members work together to help find her father and prevent the rise of SERN.
Daru somehow manages to repair the time machine, and Suzuha learns the truth about her long lost father before traveling back to 1975 for one final, desperate attempt to change the future.
Okabe and Makise realize that they cannot save Mayuri without the IBN-5100, but to find the missing computer, they must erase every D-Mail they ever sent. First up: Feyris!
Ruka is up next on the list of D-Mails to erase, but before she’s willing to surrender her femininity, Okabe must agree to be her boyfriend for a day!
The next D-Mail Okabe must erase will be the greatest challenge thus far in his quest to save Mayuri. Standing in the way of undoing the death he has witnessed so many times is none other than Moeka.
Okabe’s quest to save Mayuri and return to the original timeline leads him to an unexpected – but all too familiar – source. Is he prepared to handle the truth about those closest to him?
Despite his best efforts, Okabe is forced to watch as Mayuri dies yet another agonizing death. Subsequently, the mad scientist finds himself faced with a horrific decision: choosing which of his lab members will die!
Okabe and Makise find themselves faced with the unthinkable: saying goodbye before their time together had really even begun. Will they admit their true feelings before it’s too late?
In a completely unexpected turn of events, a face from the past returns to the present with a working time machine and a mission for Okabe – a mission that could prevent WWIII!
Okabe has one final chance to travel back in time, set everything right, and save the girl he never even got to love. His mission is vital, but it may mean the end for the mad scientist.