Mizuki Tsujimura/Synopsis

Gaiden=

Chapter 1: The Old Ravine Cathedral/ Noon/ Sunny
Tsujimura arrives at Ayatsuji's location and tries to reprimand him for assembling suspects and naming criminal without permission. Just then, the culprit of the case Ayatsuji finish deducing, runs towards the cathedral's exit. Ayatsuji points out that the killer tries to escape. Tsujimura manages to knock down the culprit over and restrains him. She then recites the to the culprit. While restraining the culprit, Tsujimura teslls Ayatsuji that she will be reporting him to the higher-ups but Ayatsuji just dismisses this. The culprit continues to resist and get away. Just then, Ayatsuji tells Tsujimura to let the culprit go, otherwise she will get caught to. Upon the release, the killer runs away and was killed by thefalling glass shards of the cathedral. Tsujimura staggers as she sees the death and tells that it is Ayatsuji's doing again. However, Ayatsuji tells otherwise - that it was an accident. Tsujimura faces Ayatsuji and describes him as a detective who "murders the culprits".

Chapter 2: In Front of the Special Division Secret Base / Morning / Sunny
Tsujimura is seen preparing to go to Ayatsuji's office. Once arrived, she contacts the support group and delivers that she's ready to track target and monitor the exterior. Before entering Ayatsuji's office, she recites a line from her favorite movie and enters the room. While trying to warn Ayatsuji to listen to him, Ayatsuji proposes a deal and orders her to make a cup of coffee. Tsujimura unconcsciously makes him a cup of coffee. Tsujimura then opens up about the incident at the cathedral and tells Ayatsuji that he ignored the division's warning and sovled another crime. She further points that that government being generous with Ayatsuji to which he gives his appreciation for that. Ayatsuji then "deduces" what Tsujimura did before coming to the office which left her embarassed. Bewildered, Tsujimura asks Ayatsuji how did he know any of it. Before finishing the question, Ayatsuji reveals that even though he have killed many in the past, he is free because the government finds his observation and his powers useful. Tsujimura asks Ayatsuji how did he know her favorite line to which Ayatsuji just responds if she doesn't want to hear it, she should keep her voice down. Tsujimura becomes embarassed and describes it as her most embarassing moment.

Tsujimura is seen monitoring Ayatsuji while writing the report about yesterday's incident and hands it over to her. Upon checking the report, Tsujimura notices the final section which contains the last words of the culprit. She then wonders if there is another person who know the crime beforehand. Ayatsuji replies that the cuplrit may had an instigator who taught him everything. Tsujimura then restates the culprit's tracks before the murder. Upon quite thinking, Ayatsuji catches on the term "wells". He then stands up and goes to the basement and thinks for a bit. He then tells Tsujimura about a gossip magazine he found in an alley three days ago, that has an article about a certain well - which describes it as evil. He then tells Tsujimura to get a work request from the division to find the well, if she wants to uncover the truth.

Chapter 3: Marshland / Afternoon / Cloudy
Tsujimura is having a meeting with the reporter responsible for the well article, Toriguchi. After learning about the well, Tsujimura relays the information to Ayatsuji.Tsujimura and Ayatsuji arrive the well's location. Upon seeing bamboo grass, purple stones at the well's exterior, Ayatsuji tells that it is a curse and orders to check the leaves for salt by licking them. Tsujimura then embarassingly proposes to just lab test it. After the checking the well once more, both of them leave the place.

During the drive, Tsujimura reassures that there is nothing to worry about and they'll find other leads. However, Ayatsuji tells her that it's their first and last lead and opens up the tale of the  and other tales wherein wells are seen as passageway between the spirit realm and the real world. Tsujimura asks if Ayatsuji thinks the well is haunted. Ayatsuji responds that the real culprit ste it up to make it look that way and orders Tsujimura to search the vicinity of the well the next day, and there's bound to be something, and looks forward to Tsujimura's performance.

Tsujimura is ordered by Ango to gather more intel about Natsuhiko Kyōgoku. Eighteen hours later, Tsujimura goes to a suburban sewage treatment plant for a secret meeting. Not a while later, Ayatsuji arrives. Tsujimura then gives the code they found at the well to Ayatsuji, telling him that the division can't decipher it. However, Ayatsuji manages to decipher it in an instant that the number points to an and they need to find an English language book. Upon searching the internet, Tsujimura tells that the book is called "". Ayatsuji then further describes what the book is about, a treatise on genes and memes, which left Tsujimura stumped anto being able to comprehend what Ayatsuji just explained. Just as they are discussing about it, a man named Asukai arrives.

Tsujimura greets Asukai and is given some pickled veggies. Tsujimura then tells Ayatsuji that Asukai has intel on Kyōgoku since he pursuing him for the past years and proceeds to ask what the military police found at the walls two months ago. Asukai then proceeds to tell them what happened. Tsujimura notes that what suprised her is that Kyōgoku was hit by Ayatsuji's ability but lived. Tsujimura then suddenly mentions about ability singularity. She then recalls what Ango said about abilities defying each other. During the conversation, Asukai mentions the Reigo island incident and Tsujimura tells herself that she had close ties with it.

Just then, a gas grenade is thrown at the place. The three run and manages escape the bullets being fired at them and safely go to a storage room. After escaping, Tsujimura glances at the opened window. However, Ayatsuji tells her to forget it as they have been surrounded on the outside too. Just then, Tsujimura notices Asukai bleeding but brushes it off and instead tells that they better get out of the place. Tsujimura tends to Asukai and Ayatsuji then stands up and tells that he has an idea.

Ayatsuji then reveals them his idea and tells Tsujimura that when escaping, if she feels threatened, she can kill them without a second thought. Afterwards, Tsujimura worries if she ccan really do it since she haven't killed anyone before. She then gather her thoughts after being encouraged by Ayatsuji. She then goes out, disarms the enemy and ask them their mission and affiliation.

She then learns that the ones attacking them are police forces agains terrorism and they were told that a civilian was holed up and there is a killer pretending to be a cop. She then tells them that they are government officials. However, the city police tries to attack her otherwise. Tsujimura manages to escape from the city police. However, just as they were going to shoot Tsujimura, her ability activates, resulting for all the city police to be killed at the scene.

Chapter 4: Department of Justice Main Building / Morning / Sunny
Tsujimura arrives at the Department of Justice building to give testimony for killing the special forces for anti-terrorism. She then asks Ayatsuji if he thinks it would be better for him if he has no ability. Ayatsuji responds that it will take 10 years for him to answer the question and asks Tsujimura when her ability was awaken and tells her that her ability might something to do about the Reigo Island incident. Curious about her mother, Tsujimura asks Ayatsuji what did she look like to which Ayatsuji responds that he has no information regarding it. He then points out that Tsujimura joined the Special Division and asks if she wants revenge on the incident.

After some time, they were approached by Sakashita. Ayatsuji is then offered to have a chat with Sakashita and follows him. However, Tsujimura stops them claiming that Ayatsuji has nothing to do with the incident and it is her fault. Sakashita tells her that it is the Special Division's fault for the city police to be killed since they;re trying to put the agenda that abilities cause no harm. Tsujimura tries to convice him that the Special Division is necessary to supress those abilities. But Sakashita didn't listen to her finish her sentence and leaves. After Ayatsuji reveals the bad things the deputy director have done so far, Tsujimura chases after the director to convince him not to dismiss her and the idea of having the Special Division for bearing responsibility. Tsujimura tries to drag him outside the elevator. However, just then, the elevator fals due to power shortage, revealing a half-body Sakashita lying on the floor afer being dragged by Tsujimura.

Plot
As a means to return his debt from Ango from the past, Chūya tells Tsujimura that her ability was "not hers", explaining that it was an automatic type response type and that it "reeked of death", indicating it had killed a high number of people, which was highly unlikely for an ability that had only supposedly activated a couple years ago. He encourages Tsujimura to remember who died when her ability activated to give her a hint of the true origins of her ability. Tsujimura then realizes that her ability originally belonged to her mother.