[The Prison Boys] Chapter 2 Walkthrough

Chapter 1  |  Detective Games ToC  |  Chapter 3


(Stages 1, 2) Nagi -The caretaker’s room-, Search – The caretaker’s room
~The 4th basement, Caretaker’s room~

Nagi Saeki
– About Nagi’s health condition
– Naoya’s funeral
– About Mitsuru
– If you find a key

Room 330 (Note: Use Move)
Drafting pen (on Tetsu’s table)

1. Move to the Cafeteria. Use the pen on the cooking oil bottle (on table).
2. Return to the Janitor’s Office. Use the oiled pen on the big, gray metal locker to the right. It will open.

Janitor’s Office

Ripped Note – RED (inside the double-door cabinet on the left)
Asakusa Movie Theater ticket (in the uniform)

1. The date on the ticket is December 5th. Enter 1-2-5 in the wooden cabinet. Interact with it again when it’s open. {+ Entertainment Magazine}
2. Note the position of the white dots (beside ‘最’, ‘新’ and ‘版’ at the bottom of the magazine cover.
3. Open the magazine. {+ Ripped Note – BLUE}
4. Combine the two Ripped Notes.
5. Go to the radio. Move the dots of the knobs to the positions of the white dots on the magazine cover. Turn the left knob 1x, the middle knob 3x and the right knob 6x. Take note of the red and blue numbers the pointer is pointing to.
6. Go to the remaining locked cabinet. The combined ripped notes says RED-BLUE. 1400 minus 80. Enter 1-3-2-0 into the lock. {+ Key to Room 318}



(Stages 3 to 5) Nagi -The Room 318-, Search – The Room 318, Mitsuru
~The 3rd basement, Room 318~

Nagi Saeki
– About rooms
– About Saeki’s family
– About the suicide note

– Scissors (Mitsuru’s bed, under a corner of the bedsheet)
– Matchbox (on Mitsuru’s desk)
– Sealed envelope (in drawer of Mitsuru’s desk)

This envelope…

I’ll open it. (✓)
I’ll pass on opening it.

1. Open the sealed envelope. {+ blank paper}
2. Use scissors on Naoya’s ‘warped’ pillow {+ drawer key}
3. Use key on Naoya’s drawer {+ handkerchief}
4. Open the handkerchief. {+ matchstick}
5. Use the matchstick on the matchbox {+ matchstick with fire}
6. Use the matchstick on the blank paper. A message will be revealed.

I said…..
I have an objection. (Note: Pick this for Ending 2.)
I have no objection. (✓ – proceed to next stage)

I said……
I’ll get out.
There’s no way I’ll get out. (Note: Pick this for Ending 2.)

Mitsuru killed Naoya (Ending 2 — The Enemy)



(Stage 9) Search – Street investigation with Yamato (1)
~The 1st basement, Entrance~

Yamato Kidou
– Partners
– About Kyouji
– About Mitsuru
– …………



(Stage 12) Search – Street investigation with Yamato (4)
~Hyoutan pond~

– A man
– Street vendor



(Stage 18) Search – To the dining room
~The 2nd basement, Cafeteria~

– Senior colleague against the pillar
– Senior colleague against the counter



(Stages 22 to 24) August 27th, Search – The library, An opened book
~The 5th basement, Library~

Nagi Saeki
– About the fake sick
– About the library

Which book will you check? (Tap the bookshelf right in front)
Blue Book
The History of the Empire
The History of the Special Political Police
The History of War

1. Tap the bottom rack of the bookshelf on the left.
2. Use the mirror on the shadowy area between the lowest rack and the floor. {+ piece of paper}
3. Use the piece of paper on the ‘square’ on the note of caution (at the pillar to the right). The arrows point to は, る, and こ.
4. Retrieve the piece of paper again and flip to the reverse side. It shows a hiragana chart with missing characters. Locate は (ha), る (ru) and こ (ko) in the complete chart here and note down the corresponding numbers in the in-game chart.
5. Tap twice to clear 2 piles of books by the left hand corner of the room. A locked book will be revealed.
6. Enter 5-1-2 for the lock.

Who should we ask about the incident?
Gen Kongou
Mitsuru Fuwa (✓)
Kyouji Hashimoto



(Stages 25 to 31) Investigation – Mitsuru’s lie (1) to (7)
~The 5th basement, Library~

What evidence do you have that makes you think Naoya didn’t kill himself?
Suicide note

The proof that this is Naoya’s suicide note is…..
Where the suicide note was left
It’s written in invisible ink.
The handwriting (✓)

What’s the reason that Mitsuru couldn’t prepare the suicide note?

Select a place you are going to point out!
Sealing wax

What is the evidence you have about the sealing wax?

The reason why the seal is simply not available is……
Because there is a chip in the edge of the seal. (✓)
Because it is Saeki’s family emblem.
Because it is a handmade.

The fatal contradiction is….
The place
The statement (✓)
The item

I think….
He has something to do with the incident. (Ending 3 — A Single Flower)
He has nothing to do with the incident. (proceed to next choice)

The reason for thinking Mitsuru is not a murderer is…
Envelope or Suicide note
*Note: Choose the wrong choices until the red bar empties to get (Ending 4 — The Mystery Vanished Into The Darkness)


Chapter 1  |  Detective Games ToC  |  Chapter 3



8 thoughts on “[The Prison Boys] Chapter 2 Walkthrough

  1. Note: This comment has been edited to add the spoiler indication.


    Hi, I’ve been playing this game for a while and I know it’s pretty late but,

    Does anyone know why Mitsuru kills Nagi and Tetsu in some of the bad endings? I’m hecca curious and confused rn


  2. Hi, thankyou for your help
    But may i asking? Why the radio code is 136?
    And the code for the book is 5, isnt it 8?
    I dont understand, may you answer me…

    Sorry for my bad english


    • Updated the guide with the hint for the radio. It’s been a while since I played this game… which book and 8 are you talking about?


      • on (Stages 22 to 24) August 27th, Search – The library, An opened book, thats say we put code 5-1-2 for a book, why is it 5? I dont understand.


        • 5, 1 and 2 are the numbers corresponding to the hiragana chart. See steps 1 to 4 under “(Stages 22 to 24) August 27th, Search – The library, An opened book”. 5 is the number corresponding to は


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