[About]
Beneath the azure sky, amidst towering buildings and bustling streets, powdery snow swirls, while colorful koi streamers drift in the wind. People stroll through the city markets, unaware that they are but whispers of waves—fleeting illusions in a vanishing dream.
A stranger arrives at the cafe and asks for your help to retrieve the memories hidden within the Irideglow...

[Eligibility]
Complete Main Quest Chronorift Metropolis Chapter II - Segue "Flowing Starlight in the Iris" and Side Quest "Scale of Past" to unlock.

[Event Rules]
Explore areas according to the clues to collect the scattered Chrono Traces.
Collect all the Chrono Traces to receive Astrites and other rewards.
More Chrono Traces will be available for collection in other areas in the future.

This feature is permanently available, and Scale of Past can still be accessed via Trace Scale after Whispers of the Waves ends.