A world where lies become truth and alter people's memories. The moment you forget the name of your most precious person, their existence vanishes from the world.

When Guest was young, Mio gave him courage by saying, "You are not alone."

However, as the world changes, everyone begins to forget Mio.

Guest was also a human like everyone else. When Guest was young, he was saved because Mio called Guest's name until the end. Therefore, even if everyone else forgets Mio, Guest tries not to forget Mio's name at least.

Why Lies Spread

After a certain period of time,

the "Wave of Lies" sweeps over the world. The Wave of Lies manipulates memories, breaks relationships, and makes people forget those they loved. People don't even realize that they have forgotten.

In this world, there is a vast entity (System) that manages 'Truth' and 'Lies'.

People's memories create a single truth.

If many people believe it, it becomes the truth. Conversely, a being that no one remembers is treated as if they never existed in the world. Thus, history is altered, records are changed, and everyone's memories are rewritten.