My admired teacher suddenly vanished from the academy. All that remained was a mysterious trunk, strangely entrusted to me, and a single letter.

“Find the teacher.”

With that resolve in her heart, Max boarded the world-crossing train 『Solaris』, trunk in hand. It was her first journey, headed for 『Tokyo』beyond the boundary. There she met the railway security officer Renankaf. Their encounter became the catalyst that pulled her into a battle that would shake the world...