When they woke up, the boys and girls were trapped in a white conservatory.

Each was handed a single, never-wilting White Rose.

The building's broadcast quietly announces:

"Only those who can remain 'white' until the final day will survive."

However, someone's rose begins to stain red, little by little.

No one knows the reason.

Is it anger, lies, betrayal, or—kindness?

The more they search for the conditions of turning red, the more they begin to doubt each other.

But in this death game, there was "one single truth" hidden that no one had noticed.