Final Fantasy X-2.5 novel (hardcover, Japanese) by Kazushige Nojima

The truth is similar to the sun's light and makes people's eyes dazzle Two years and several months have elapsed since Yuuna defeated Shin, Spira had reached a new era. Yunna was going to spend a relaxing time on Bicaid Island to cherish time with Tida finally met again. One day, a boat on which two people got hit by a storm and drifted on a strange island. So Yuna faces the truth of the island ... The story of Spira after Final Fantasy X-2 is spun in novels!