Sentinels The Keeper of Light (Paperback) (ISBN-13: 9798258013569)

Sora uses delusions to survive his reality.

To everyone else, it's just fantasy-imaginary battles and a war against the "Ancients." But his best friend Rio begins to see those delusions differently. After uncovering the truth behind them, Rio and his friends dive into Sora's world to understand what really happened to him.

What starts as make-believe quickly becomes something rooted in reality.