Sennenkimatsu ni Hoeru Koi

Amid war, Tenyoh and Uru are more than comrades-in-arms—they're as close as brothers, or perhaps a pair of mated birds. Living and fighting among their country's elite troops, they share a deep bond of love. But fate suddenly tears them apart when Uru is killed behind enemy lines, leaving Tenyoh with nothing but a kiss and a promise to live on.

Two years later, Tenyoh is tasked with launching a surprise attack on the enemy general, Kakezuki...but this general bears the face of his beloved Uru. Who—or what—is Kakezuki? What really happened to Tenyoh's lost love?

(Source: Square Enix)