TRIANGLE STRATEGY now has a Steam Listing, confirming the rumor that a PC edition of this Switch tactical/RPG is in the works. Those interested will not have long to wait, as this shows an October 13th release date. The Steam Announcement Trailer has a first look. This post from Square Enix covers the announcement and outlines options for a Deluxe Edition or a Deluxe Edition/Various Daylife bundle. Here's part of the introduction that sets up the story:
Three mighty powers have long waged war on the great continent of Norzelia.

This land bears a long and scarred history that includes the Saltiron War, a war that erupted over control of salt and iron resources. A balance of power has been achieved between the Holy State of Hyzante, which controls the salt, the Grand Dutchy of Aesfrost, a land of iron clad in frost and snow, and the forested Kingdom of Glenbook, which lies nestled between the other two powers.

However, a certain incident shakes the balance between these three powers, which then begins to crumble away...