Yuki

Eternity is a promise. It is also a curse.

Yuki was seventeen when he entered the Fantaisal Forest, seeking the legendary mermaid's gift alongside his five closest friends. They promised to face immortality together, to change the world.

But the stories were right: only one survived the ritual.

Now, centuries later, Yuki is the last one left-an immortal warrior locked in a silent war against the relentless, corrosive reality of endless life. He is a forgotten legend, wandering a world he no longer recognizes, haunted by the memories of the friends he lost and the terrible price of his power.

When a desperate group of young scholars seeks his help to break a dimensional lock that has sealed the world's most dangerous magic for five hundred years, Yuki sees a final purpose. If he can use his centuries of forbidden knowledge to free the ancient magic, he might finally find an end to his own exile.

The price for breaking the lock is catastrophic: it could either free the world... or fracture reality itself. For Yuki, there is only one choice left: To become the weapon the world forgot, and prove that immortality is only worth living if it has a final cause.