Unlocking the Hello Kitty Island Adventure Sewers: A Complete Guide
Explore the hidden depths of City Town in Hello Kitty Island Adventure! This guide details how to access and navigate the City Town Sewers, a location brimming with new content. Note that access isn't immediate after reaching City Town.
The Quest to Unlock the Sewers:

The key is the "Above and Below" quest. To unlock it, you must first complete the "Tea Time" quest. "Tea Time" requires:
- Reaching Level 10 Friendship with Usahana.
- Completing the "Imagination Cafe" quest (unlocked at Friendship Level 7 with Usahana, requiring completion of "A Whole New Menu" at Friendship Level 3).
Once "Tea Time" is complete, you can begin "Above and Below."
Completing "Above and Below":

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Start with Hello Kitty: Begin the quest by speaking with Hello Kitty. She'll arrange a meeting with Usahana in City Town.
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The Fountain Meeting: Find Hello Kitty, Chococat, and Badtz-maru at the town fountain. A short cutscene will follow, focusing on the City Town fog (currently non-interactive).
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Boba Time!: Prepare four Unsweetened Apple Boba drinks (1x Tea Leaves, 1x Apple, 1x Tapioca each) at the Chef's Station. Deliver them to the group at the park.
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Sewers Revealed: After the boba delivery, Badtz-maru will mention the sewers, leading to a conversation that reveals the sewer entrance (south of the fountain).
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Underground Introductions: Solve the puzzle in the Underground Introductions room (detailed below) to complete the quest. You'll find a Green Turtle Shell Backpack as a reward.
Solving the Underground Introductions Puzzle:

This puzzle involves manipulating water levels to place golden cubes on buttons. Any cube can go on any button. Follow these steps:
- Collect two cubes from the bottom of the room and place them on the Pink and Blue buttons.
- Temporarily place a third cube near the Blue button.
- Obtain the fourth cube from the upper platform.
- Place the fourth cube near the Blue button.
- Raise the water level using the switch.
- Grab one of the temporarily placed cubes.
- Place this cube on the Green button.
- Collect the final cube.
- Place the final cube on the Yellow button (after raising the water level again).
- Flip the switch with the shape icons to reveal the chest and unlock further sewer areas.
Re-entering the Sewers:

There's no in-game map, so you can't freely teleport. Use ladders or mailboxes to exit and re-enter. Manholes scattered throughout City Town also provide access. Be aware of Gudatamas disguised in some manholes—photographing them removes the manhole.

Enjoy exploring the secrets of the City Town Sewers! Remember to consult online community resources for unofficial maps to help you navigate.
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