Traveler of the River of Time and Space - Chapter 511 - 28: Quiet Departure

Chase withers lives a terrible life of isolation. even coming to this fantasy worlds his is crippled, unable to use mana. But he stumbles upon the remains of an ancient evil, eager to rise again. with this power, what will he do?

This is a very interesting thing. It is obviously dim and black, but it can emit a golden light, which makes people deeply fascinated by it…

- Description from novelbuddy

Xue Xi is forced to fall in love at first sight with this dangerous man on their first meeting. With death being the only other option, she makes the first move:

Side story of Kyoukai Senjou no Horizon bundled with the first press release of the 1st, 3rd, 5th and 7th Blu-ray volumes of both seasons of anime.

This side story follows Asama, Kimi and Mitotsudaira aboard Musashi one year before the beginning of the main story, as Asama is considering to create a music band together with her two friends for the next festival in Aki, a territory under the governance of K.P.A. Italia.