Ao Oni 5.2 Walkthrough - Main Building

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Head to the kitchen to your right.
Inspect the broken plate.
Obtain Plate Shard.

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Walk out of the kitchen.
Go to the entrance hall.

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Go towards the hallway to your left.
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Go back to entrance hall.
Head upstairs twice towards third floor.
Enter the room on the bottom right.
Go towards the chair. Inspect the closet.
Inspect the chair.
Obtain Library Key.

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Head back to the entrance hall, go to the right hallway.
Enter the door.
Use Library Key.

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Obtain Bedroom Key.
Walk upstairs to the third floor.
Enter the door to your left.
Use Bedroom Key.
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Inspect bed.
Obtain Memo.
Push bed.
Go down the hole.

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Inspect bookshelf.
Exit the room to unlock the door.

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Go to the bottom right room again.
Inspect the closet.
Obtain Handkerchief.

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Go downstairs to entrance hall.
Head towards left hallway.
Enter the open door.
Inspect bathtub.
Obtain Attic Key.

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Go to the door to the left.
Inspect the immediate cabinet.
Obtain Soap.

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Go to the room with the piano on the second floor.
Stand in front of the piano keys.
Use Soap.
Answer "Yes".
Use Handkerchief.

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Go to the top-left room on the second floor.
Push the chair to be facing the shelf with an object on it.
Get on top of the chair.
Obtain Lighter Fluid.

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Go downstairs to entrance hall.
Enter the door leading upwards.
Walk into the left-side section of the sliding doors.
Open one of the tiny doors.
Obtain Lighter.

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Use Lighter Fluid.
Answer "Yes".
Use Lighter.
Answer "Yes".

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Go back up to second floor, enter the room with the piano.
You will need to solve the piano puzzle.
(Click the link in case you need help solving it.)

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Enter the piano puzzle solution combination
into the safe on the top-right side of the room.
Obtain Kid's Bedroom Key.
Exit the piano room, head to the top-right room.
Use Kid's Bedroom Key.
Talk to Mika.

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Inspect the back of the couch.
Use Plate Shard.
Obtain Phillips Head Screwdriver.

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Go upstairs to third floor.
Enter the door to your right.
Inspect the frame on the bottom-right side of the room.
Here's a guide on how to solve this puzzle.
(Click the link in case you need help solving it.)
Obtain Cipher.

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Go downstairs to second floor.
Enter the door on your right.
Inspect the frame.
Obtain Mansion Map.
Use Cipher.
You will need to solve the soroban puzzle.
(Click the link in case you need help solving it.)

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Go upstairs to fourth floor.
Use Attic Key.
Use Phillips Head Screwdriver on door.
Obtain Door Knob.

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Use Lighter.
Answer "Yes".
Head downstairs to main hall.
Enter the door leading upwards.
Use Plate Shard on wallpaper.

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