How to trigger and complete Puppet Piano event in NTE?

This Puppet Piano FAQ is more useful when it explains **what kind of hidden puzzle content it is and how players should judge whether they are actually ready to enter and complete it** instead of preserving one mechanical checklist of chapter gate, nighttime condition, and reward table. For current players, the practical questions are whether the event is more about atmosphere, memory, or observation, whether their current progress makes it visible at all, and whether they need a steadier exploration rhythm before attempting it.

A safer way to read it is:

1. Treat Puppet Piano as **a hidden puzzle event built around presentation, observation, and timing** rather than as a simple side quest solved by copying one route

2. If the trigger point has not appeared yet, check area access, exploration timing, and prerequisite progress before relying on one old chapter threshold

3. What usually determines the experience is how well you read melody cues, hints, and interaction flow, not the exact reward list alone

So this page now focuses on trigger judgment and puzzle-experience logic for Puppet Piano instead of preserving one fixed walkthrough sheet as the long-term answer.