Chapter 1

## Tokyo Underworld

* Cover
* Lead Page

## Chapter Chronology

**Tokyo Underworld** (深東京, *Shin Tōkyō*?) is the 1st chapter of *Tokyo Underworld* manga, written and illustrated by Kenji Sakaki. This also serves as the first chapter of the first volume of the manga series.

## Summary

Yomi Kanda, a 16-year-old student, was observed defending their homeroom teacher, Masatoshi Yabuuchi, who is 60 years old, against a classmate known as Kashiwagi, who has a reputation for being a troublemaker. Yomi intervened when Kashiwagi nearly pushed their teacher through a classroom window but ended up getting hit by Kashiwagi in the process. Yomi's twin brother, Yami Kanda, arrived on the scene and pulled Kashiwagi's hair to prevent him from harming the teacher further. Both Yomi and Yami had visible injuries on their faces, leading Kashiwagi's friends to speculate that they had been in a fight with others.

Yami threatened to harm anyone who attacked his twin brother and briefly pushed Kashiwagi towards the classroom window. Masatoshi Yabuuchi, the teacher, mentioned that this kind of behavior was not uncommon in their class, Class 2-A, which prompted the school's dean to grant the brothers some leniency based on the teacher's statement.

Outside the office, Yami expressed his anger at Yomi for getting involved in other people's conflicts, putting himself in potential danger. Yami reminded Yomi about the phenomenon known as Twin Synchronicity, where one twin feels the same pain as the other when severely injured. Yami advised Yomi to focus on himself, emphasizing that their teacher deserved support from his own family, just as he had protected and helped them against their teacher's bully.

The twins exchanged pleasantries with Teacher Masatoshi, who appeared fatigued from a discussion with the school's dean about the incident. The teacher mentioned that his leniency had been due to his kind demeanor, which had angered Yami because he believed the teacher's kindness had allowed Kashiwagi to bully him.

The teacher, seemingly tired of further conflicts, bid farewell to the twins and suggested they prepare for an upcoming field trip. As the twins walked away, the teacher appeared to be reading tweets on his phone related to a triangle-shaped drawing.

Later, Yomi, who had finished eating, found Yami smoking by his bedroom window. Yomi scolded his brother, warning him that their parents would be furious if they were present. This conversation led them to reminisce about their past.

Their parents had disappeared five years ago, and the police had given up the search at the time. The brothers had undertaken an extensive search, visiting 23 towns across Tokyo in an attempt to find their missing parents. Yami believed their parents were alive somewhere, relieved that they had left their troubles behind. Yomi disagreed, believing there must be a reason for their parents' absence. Yomi recalled comforting his crying brother at the time, promising that they would work together and be fine as long as they had each other. With those words, Yomi left his brother's room, turning off the lights.

It was announced that they would go on a field trip to Tokyo Tower, but Yami was unimpressed as he found it uninteresting. As they argued on their way to the tower, Yomi noticed Haine Saikawa looking out the window at the tower's view. Yomi approached her and complimented the view, but she responded coldly. Yami complained about his brother, and Haine mentioned she despised Tokyo Tower and brought up something called "Tokyo Underworld," which confused Yami and Yomi since they hadn't heard of it.

Haine explained that it's another Tokyo where those who have caused someone's death are punished. Yami remembered that it was thought to be a real-life hell with sinners and demon guards. Haine mentioned social media claims of people escaping from there, treating it as an urban legend.

Meanwhile, Teacher Masatoshi, worried about his unruly students, was seen anxious and wetting himself. Yami, Yomi, and Haine rushed to help him. Students discussed pictures on social media taken by one of Kashiwagi's friends, with mixed reactions.

Masatoshi then stood up and announced his intention to address his students' behavior, stating that he couldn't tolerate it any longer. Yomi and Yami cheered him on, while Kashiwagi reacted poorly to the teacher's words. Masatoshi revealed his dedication to teaching and the humiliation he endured, declaring his resolve to take action.

With a tumbler in hand, Masatoshi spoke solemnly about sending them to the Tokyo Underworld. Students laughed, prompting Yami to question how they could go there since it was for criminals. Masatoshi drank from the tumbler, which contained coffee laced with pesticides, and accused the students of driving him to his death.

Filled with rage, he threatened to kill them all and ensure their punishment, then suddenly collapsed, bleeding from his mouth. The bus began to tilt, causing panic among the students, and the sudden death of their teacher added to their distress.

The day started with an announcement about a field trip to Tokyo Tower, which Yami found uninteresting. As they argued on their way to the tower, Yomi noticed Haine Saikawa quietly gazing out the window at the tower's view. Yomi approached Haine and complimented the view, but her response was cold. Yami complained about his bothersome brother, and unexpectedly, Haine expressed her dislike for Tokyo Tower and introduced the concept of the "Tokyo Underworld."

Haine explained that the Tokyo Underworld is a place where those responsible for someone's death are punished. Yami recalled it as a real-life hell with sinners and demon guards, an urban legend some claimed to escape from on social media.

Meanwhile, Teacher Masatoshi, concerned about his unruly students, was visibly anxious. Yami, Yomi, and Haine rushed to help him. Meanwhile, students discussed pictures on social media taken by one of Kashiwagi's friends, with mixed reactions.

Masatoshi stood up and declared an end to ignoring his students' behavior. He vowed to set things right as their homeroom teacher, sharing his dedication to teaching and enduring the students' misconduct for years. Yomi and Yami cheered him on, but Kashiwagi responded negatively.

With a tumbler in hand, Masatoshi somberly stated that he was sending them to the Tokyo Underworld. His students, including Kashiwagi and friends, laughed, leading Yami to question how they could go there when it was supposedly for criminals. Masatoshi, without a word, drank from the tumbler containing coffee laced with pesticides.

Afterward, he accused his students of driving him to his death, referring to them as his murderers destined for the Tokyo Underworld. He threatened to make them suffer for their actions, expressing his choice to do so due to the humiliation he endured from his own students.

In a fit of anger, he vowed to punish his Class A students, dripping blood from his mouth. Suddenly, he collapsed on the bus floor, potentially endangering the trip as the bus tilted. The students were horrified, both by their teacher's death and the chaos that ensued.
As they descended, Yomi noticed that they weren't alone; they were under observation. Haine woke him from his trance, and he was immediately surprised to find his unconscious brother, Yami, beside him. When the three of them finally stood up inside the bus, they were shocked by the situation. All their classmates were unconscious on the bus floor, and they gradually woke everyone up. Haine checked the bus driver's seat, but the driver was missing, and her phone had no network signal.

As they turned around, they saw their teacher's lifeless body, which was a tragic outcome after he had vomited blood earlier. They felt remorse for what had transpired, culminating in the teacher's suicide. Most of them blamed Kashiwagi, who had been the main instigator of the bullying against the teacher. In response, Kashiwagi argued that they were all equally responsible for not intervening to help the teacher, claiming they had no right to accuse him. The brothers were infuriated by Kashiwagi's words and advised him to stop talking to avoid further problems.

Yomi took the lead in planning their next steps, suggesting they stay calm, exit the bus, and seek help. After a while, one of their classmates noticed that the bus was moving, causing everyone to panic and rush out.

Once outside, Haine became overwhelmed by fear when she spotted what seemed to be a large eye-like camera positioned at the center of the tower. This camera was only visible from the bridge they were on. In response to her fear, she said, "No, I can't. Not Tokyo Tower!" while hugging herself tightly.

## Characters in Order of Appearance

**Yomi Kanda**Debut
**Kashiwagi**Debut
**Masatoshi Yabuuchi**Debut
**Yami Kanda**Debut
**Haine Saikawa**Debut
## Trivia

* **Twin Synchronicity:** It is known to be two distinct individuals who have meaningfully shared experiences. This means that they can be experienced by two people at the same time. It is especially common in twin flames. Because their bond is deeply divine, divine signs are required to bring them together and orchestrate the reunion.
* **Tokyo Underworld (Place):** According to what Haine Saikawa has already stated, Tokyo Underworld is another Tokyo where those who have driven someone to death fall. The fallen have been found guilty and punished, and have been sentenced to death by the watchers. To be more specific, as  Yami mentioned, it is known to be a real-life hell.