A Yun’s Office Fixer Page is a set of 3 Key Pages, with only Page 1 being obtainable from mostly Books of Yun’s Office and Streetlight Office Books with 4 Maximum copies obtainable. They are used by the Grade 9 Yun's Fixers and Yun's Fixers, in the Yun’s Office Episodes 1 and 3.
All the suits have 43 HP and 22 Stagger. It has 3 Lights, a Speed Dice of 1~4, and has 1 Passive Ability.
A Yun’s Office Fixer, Page 1 is a Melee Key Page obtainable from the Books of the chapters (5 copies):
Yun’s Office: Book of a Grade 9 Fixer - Book of Yun’s Office - Book of Eri - Book of Yun
Streetlight Office: A Backstreets Fixer, Vol I - Book of Lulu (4) - Book of Mars
It looks like a full gray suit, complete with a jacket, dark shoes, and gloves. The weapon wielded is a spiked bat.
It is used in Yun’s Office Episode 3, Act 1; by 2 Yun's Fixers.
Its Passive Ability is:
Slash of a Grade 9 Fixer (Cost: 1): 50% chance to boost Slash Damage by +1
A Yun’s Office Fixer, Page 2
A Yun’s Office Fixer, Page 2 is a Melee Key Page, that used to be obtainable from the Books of the Yun’s Office Episodes. It looks like a full dark gray suit, complete with a jacket, dark shoes, and gloves. The weapon wielded is a large baton or blade.
It is used in Yun’s Office Episode 3, Act 1; by 1 Yun's Fixer.
Its Passive Ability is:
Knock of a Grade 9 Fixer: 50% chance to boost Blunt Damage by +1
A Yun’s Office Fixer, Page 3
A Yun’s Office Fixer, Page 3 is a Melee Key Page that used to be obtainable from the Books of the Yun’s Office Episodes. It looks like a full black suit, complete with a jacket, dark shoes, and gloves. The weapon wielded is a bat wrapped in barbed wire.
It is used in Yun’s Office Episode 1, Act 1; by 1 Grade 9 Yun's Fixers.
Its Passive Ability is:
Thrust of a Grade 9 Fixer: 50% chance to boost Pierce Damage by +1
Story
page 1
"The society of Fixers is built entirely up on meritocracy. The greater you are, the higher you can climb. On the other hand, if you don't have the capability, you should be thankful for any org that accepts you and stay low. Thing is, 'capability' can mean many things. For some, it could be physical strength, and others might have superior intellect. It seems kinda unfair to me that they make arbitrary evaluations of a concept that can be taken in so many different ways. Not that I think I have some hidden talent that deserves a better grade or anything, though. I do feel a bit upset, but i think I'm at the right place. The jobs I usually do are looking for lost cats are night... You can tell how low my spot is, yeah?
I'm not a huge fan of the jobs I'm doing right now, of course. I mean, sure, I wouldn't say no to some flashier requests. I just accepted to carry on with my life."
page 2
"The Backstreets are alleyways densely spread across the city. They're entangled like spiderwebs, and spread far and wide, so it is virtually impossible for one to know every single thing that occurs in the Backstreets. And they're populated with all sorts of people.
Examinee towns where people preparing for entrance exams in hopes of getting into a Nest have gathered; Syndicates and Fixers thirstily looking for business; workshops that benefit from their conflicts, crafting various tools and gadgets... It's a disorderly lump of all kinds of desires for wealth and dreams.
People think Fixers are "good guys" who fight off bad guys here, but they're just humans in reality. They're simply doing their jobs to make a living. Some clients look at us with sparkly eyes like we're heroes or something. This might seem funny to you, but things get troublesome if we don't fulfill their requests. They give us a disappointed look, yell profanities at us... Turn into rude customers before leaving"
page 3
"A hotshot Fixer gets all the push they can get from their Office. And an Office housing competent Fixers can get sponsorships from Associations, Wings, or workshops. The same can be said for individual Fixers: the spicy ones are sought after by many firms. But that won't be you guys. Most of us have to purchase equipment with our own budget. Insane things happen in the City, and even Rats could tear you a new one if you haven't got any useful gadgets or procedures.
And how do you get the money for that? Duh, you're supposed to earn it, isn't that obvious? ...Funny, isn't it. You jump into the Fixer business trying to earn money, but you need to get into debt and spend money to be able to do proper work. How ironic is that? This world's one giant hamster wheel."
Trivia
Grade 9 Yun's Fixers, the only users of A Yun’s Office Fixer, Page 1, are the first Generic Guests that appear in the Story and through Red Invitations.
Yun’s Office and 
Streetlight Office Books with 4 Maximum copies obtainable. They are used by the Grade 9 Yun's Fixers and Yun's Fixers, in the 
HP and 22 
Stagger. It has 3 
Lights, a 
Speed Dice of 1~4, and has 1 
Passive Ability.
Melee Key Page obtainable from the Books of the chapters (5 copies):
Yun’s Office: Book of a Grade 9 Fixer - Book of Yun’s Office - Book of Eri - Book of Yun
Streetlight Office: A Backstreets Fixer, Vol I - Book of Lulu (4) - Book of Mars
Slash of a Grade 9 Fixer (Cost: 1): 50% chance to boost 
Slash Damage by +1
Blunt Damage by +1
Pierce Damage by +1