Haruo is an ordinary junior high school student who leads a peaceful life with his three sisters. One morning, he sees a cute girl across the street who vanishes in a gust of wind. From this point on, his peaceful life becomes anything but peaceful, as ordinary, boring days suddenly take a turn into chaos.In the end of the story, it is revealed that since the elders can't contain the demon lord's (Haruo) overwhelming power, they have set up Hongō-sensei as the witch to cast the magic spell to reverse the flow of time, and makes the world repeat itself everytime the power is released. She will die each time the process is done because the power of the demon lord is so strong, and this will activate a replacement of her as it is also revealed she is a cyborg.
A baseball bat-wielding adolescent randomly attacks five people in Tokyo, each of whom is grappling with a serious problem. Toy designer Tsukiko endures tremendous pressure to repeat her previous success; bottom-feeding journalist Kawazu desperately needs money. Popular sixth grader Yuuichi feels threatened by the new kid in his class, the dumpy nerd Usshi. Yuuichi's tutor Harumi is a compassionate scholar by day; at night, she becomes Maria, a sleazy hooker. The seemingly purposeless violence of Lil' Slugger (originally Shounen Bat, literally "Bat Boy"), also disrupts the lives of police detectives Maniwa and Karino, and their corrupt boss Hirukawa. As he did in Perfect Blue, Kon deliberately blurs the boundaries between reality and fantasy: Does Tsukikio's stuffed toy really talk to her? Which is Harumi's true personality?
Young Kyosuke Date is suddenly stabbed by his mother and left for dead in a cathedral. Kyosuke is buried alive, but is soon dug up by a mysterious girl. He then searches for answers to why his mother stabbed him, looks for a long lost sister, and also tries to find answers to why he is able to transform into the superhuman mutant, Soul Taker.
The dark untold story of Steins;Gate that leads with the eccentric mad scientist Okabe, struggling to recover from a failed attempt at rescuing Kurisu. He decides to give up and abandons his lively scientist alter ego, in pursuit to forget the past. When all seems to be normal, he is seemingly pulled back into the past by meeting an acquaintance of Kurisu, who tells him that they have begun testing a device that stores the memory of a human and creates a simulation of them with their characteristics and personalities. Okabe begins testing and finds out that the simulation of Kurisu has brought back anguish and some new unexpected tragedies.Zero is a side story that explores events from the Beta Attractor Field's future that contribute in making the end of the original story possible.
Steins;Gate is about a group of friends who have customized their microwave into a device that can send text messages to the past. As they perform different experiments, an organization named SERN who has been doing their own research on time travel tracks them down and now the characters have to find a way to avoid being captured by them.