Full Timeline

SMA
Sensei Prime grew up in the real world. He had a relatively normal childhood, however he constantly felt that he was competing with his more confident and mature brother. Sensei Prime was infatuated with his brother's wife, however the feelings were never reciprocated and Sensei was left feeling lonely and adrift. When Sensei Prime was in college (likely studying something involved in computer science or medicine), he was involved in a car accident with his brother and sister-in-law. Sensei was left largely unharmed but the brother and his wife were killed, leaving their seven year old daughter Maya Prime orphaned. Sensei took in Maya to raise her as his own, abandoning his ambitious career goals and instead focusing on a basic teaching job.

As Maya Prime grew up, the relationship between her and Sensei Prime grew closer as the only two surviving members of their family. When Maya became a teenager, she confessed that she had romantic feelings for Sensei and after a few weeks he gave into his feelings and their relationship became sexual. Some time afterwards, it came to light that Maya Prime was pregnant. Both Sensei and Maya were immediately terrified of what this would mean for their lives and their relationship, and a decision was made (likely with heavy pressuring from Sensei) to abort the unnamed baby. This event broke Maya Prime, and she wound up throwing herself off of the roof of the school soon after much to Sensei's horror. She survived the suicide attempt but fell into a coma and was kept on life support with little chance of a recovery.

The Upside Down House
Now completely alone in the world and suffering immense guilt over what he had caused, Sensei Prime fell into a deep depression. His home life became a wreck, living in squalor and surviving almost entirely off of water and garlic bread. He managed to maintain his teaching job and still tried to help the girls in his care, but gradually became more distant and detached from reality. As his mental health deteriorated, Sensei became obsessed with finding a way to right his wrongs and repair all of the damage he had done to his life and the lives of those around him. Drawing on his earlier ambitious career studies, Sensei Prime began to design a virtual world where an individual's consciousness could be uploaded to live in a seamless, fantasy version of reality. As his designs became closer to reality, Sensei likely pitched the idea to others as a means to accrue money and resources to make this dream a reality. Once acquiring backing (either as form of medical research or possibly from wealthy individuals interested in the system as a means of escape from reality), Sensei moved to a remote medical facility and began work bringing his system to reality.

Either through his connections with the school or as a means of medical treatment, Sensei began to bring "patients" into his care; namely teenage or young adult women suffering from severe mental disorders. The process to insert them into the simulation was likely gruesome, potentially involving the removal of limbs and a complete forfeiture of autonomic processes like breathing to the machinery of the system. Early tests were less than fully successful, with some subjects dying (their bodies being disposed of in the facility's boiler room) and others being inserted into the simulation with severe memory loss or personality oddities. However, over time the process was refined and Sensei was able to begin successfully adding the first batch of women into the world that he had created. Without the knowledge of those backing him, Sensei Prime also executed the true purpose of the system; he added a virtual avatar of himself to the world, with the intent to allow himself to live the happy life that he had grown to feel robbed of in reality.

Kumon-mi: The Callous Era
Although the foundation of the world was set, the world itself still needed to be constructed. For this purpose Sensei Prime created an entity named Nozomu and tasked him with building and maintaining the world inside the simulation.

Fearing that his world would succumb to the same guilt, loneliness and pain that had plagued him in reality, Sensei Prime instilled Nozomu with a core trait - callousness. With this it was hoped that the residents of this new world would be able to resist or ignore the misery that was present in the real world and live out happy, fulfilling lives in the simulation. With this initial incarnation of Kumon-mi created, Sensei Prime added the characters from the Upside Down House and let the simulation run.

The world may have functioned for a time, but gradually it began to devolve. The callous nature that had been infused into the world to immunize the residents against emotional turmoil also resulted in a loss of the emotional constraints typical in healthy society. Selfishness began to overwhelm the populace, drugs and crime became commonplace and the healthy and fulfilling life that had been intended was supplanted by one ruled by animal-like desires and hedonism. Nozomu tried to retain control, creating laws to govern the relations between individuals but they were ignored and the populace turned against him. Nozomu died, either killed by the rebelling populace of the world that he had created or taken offline by Sensei Prime who observed from above. This version of Kumon-mi was declared a failure and was shut down, with only a handful of the residents' minds being recovered unscathed.

Kumon-mi: The Calm Era
Seeing his creation fail so spectacularly, Sensei Prime doubled down on his obsession with creating a world where he could be truly happy. It was clear that immunizing oneself against negative emotion was an impossible task; misery always finds a way to creep in. Sensei instead chose a different path: rather than trying to make people live with the consequences of of their actions, he would remove the consequences altogether.

A new Kumon-mi was created. On the outskirts of this world, the dead remains of Nozomu were buried and the unrecoverable survivors of the old system were allowed to continue their now hollow lives. This would become the Old District. A new entity was created to replace Nozomu and his callous nature: an inhuman god of wires, overcome with calm. Unlike Nozomu, the wire-god had no interest in directly influencing or altering the lives of the residents of the new world. Instead the wire-god simply waited and observed, and would only intervene when serious abberations showed themselves.

Whereas the old world had been one meant for Sensei to allow himself to move on and accept his past, this new Kumon-mi was built so that he could erase it. While the virtual Sensei within the world would retain some interests and personality traits of the original, his memory was completely wiped upon entering the world. The system would then ease him into his new life within the context of a game, where his new world was tailored specifically so that he would have the easiest path forward. However, even with the wire-god preventing any major catastrophes, there was no guarantee that this new version of Sensei wouldn't just follow down the same path and make the same mistakes as the original. Not knowing what specific personality traits would lead to true happiness, the system was built around a cycle of resets: At the beginning of a cycle, a new virtual Sensei would be created with a randomly chosen personality compared to the last. This Sensei would then be run through the system for approximately three months, with Sensei learning to live and make progress in this world. At the end of a standard school semester, he would be tested and judged. If it was deemed that any given incarnation of Sensei had made positive progress and was on a good path, he would be allowed to have his memories sent back to the beginning of the three month loop along with his relationship progress with others. If he was judged as a failure, his mind would be wiped and reset to it's default state at the beginning of the school semester and a new personality would be randomly chosen to be tested next. Through this trial and error the hope was that some version of Sensei may be able to navigate the inherent horrors of living and find his way to actual happiness.

For the plan to work, the system needed a judge to decide whether any given Sensei was worthy of continuing or being deleted. Sensei Prime introduced the still comatose Maya Prime into Kumon-mi to act as this judge, as someone who knew Sensei better than anyone and who would be able to properly ascertain which versions of Sensei would be the successes versus the failures. The new Maya that was created inside Kumon-mi would be able to choose the exact moment when the world would be reset and would retain her memories through the process, and it would be up to her discretion whether or not to physically bring Sensei back with after each period of the cycle.With this mechanism in place, the simulation was ready to begin, but Sensei Prime wanted one further reassurance that the system wouldn't degenerate like it did under Nozomu. Rather than leave events just to the whims of the wire-god, Sensei Prime inserted himself into the system, throwing himself into the wishing well so to speak. Now within his creation, he became a third god, one overcome with concern for Sensei and his endless quest to achieve happiness. He became infused with the world, seeing everything as if from the sky, and would begin to act as a subtle guide prodding each new incarnation of Sensei towards the path that he saw fit. This new entity would become known as Sekai.

With the creation of Sekai, one final being needed to be born. Either subconsciously or intentionally, Sensei Prime's immense guilt over his previous loss of Maya and the abortion that had caused it led to the creation of Ami. Unlike all the other teenage girls who had their physical bodies housed within the Upside Down house, Ami's existence was a pure fiction of Kumon-mi, a girl born through some unholy union of Nozomu's power of creation and Sekai's overwhelming desire to make things right with the child that he had never had a chance to actually father. Like all the girls in the system, Ami had a fabricated memory that gave her the role that once belonged to Maya, prior to her loss of innocence. Ami would become an idealized niece to Sensei, immensely loyal and with her entire existence devoted to keeping her uncle close by so that he would never abandon her the way that he had abandoned his unborn daughter back in reality.

Kumon-mi: Current Sensei
For hundreds or thousands of resets, the wire-god has maintained Kumon-mi and the system that underlies it. Incarnation after new incarnation of Sensei has been created, allowed to grow and come to terms with his new world only to inevitably be deemed too callous, too calm, too concerned or just too weak to actually achieve the happy existence that Sensei Prime had dreamed of. Maya, forced into a role she never wanted and forced to watch a man she once loved continually be erased and reborn (only to attempt to sleep with her classmates) takes it's toll, and she gradually becomes more cold, distant and disengaged from the world and those around her.

The wire-god itself is beginning to deteriorate. The wires themselves are becoming frayed and disconnected, either due to the unending task of resetting the world or just the gradual march of time, and as a result it's ability to collect information and correct errors is waning. Things are happening that have never happened before, parts of the world are being destroyed and the number of girls in Sensei's class is suddenly becoming larger than the system was ever built to handle. Ami is particular appears to be most impacted by the decay, frequently glitching out as the god that is presumably controlling her falls apart.

Nozomu, thought to be long dead, has awakened from his slumber. With the influence of the old district ever growing, the Callous God uses the weakness of Calm as a chance to strike. He uses Sensei to lure HOPE into the Old District and takes control of him, finally giving him an avatar with which to affect his will. His final goal is yet unclear, but he appears to be guiding Sensei to murder of Sekai, potentially to allow Sensei to take the reins and remake the world yet again. Nozomu uses HOPE to seemingly attack or take control over the wire-god, however as of the current version we don't know the full effects of this.

Our current Sensei, meanwhile, seems to be developing much faster than normal. While he began his life substantially more callous and flippant about the world that he found himself in, he seems to be becoming much more concerned about the girls and his place among them. He has made substantial personal bonds with several others and seems to be making a conscious effort to be better in ways that certain gods seem to have wanted to prevent.