Hanakisou

Hana Ki Sou, sometimes translated as “Flower Funeral”, is a doujin PC Boys Love Game released by Haccaworks in 2003. A voiced Playstation 2 port with new content was released in 2006; a PSP port followed in 2010. There is also a two-volume manga adaptation.
Kuroto was born to destroy the world; and so Hanashiro was born to save it. The only way Hanashiro can do that is by killing Kuroto. However, they one day meet and become very close, and Hanashiro becomes completely unwilling to fulfill his duty as the Savior. With conflict rising among the nations, the fate of the world has become unclear…
In Hana ki sou a young man awakens in the snowy wilderness with no memory. The boy watching over him informs him that his name is Kuroto, which means the winter that announces the end. Claiming to be a traveling companion, Hanashiro reassures Kuroto and says he will help him regain his memory. More questions arise once they reach the nearest town and are soon confronted by the military. While Kuroto attempts to grasp the quickly developing events around him, snow quietly continues to fall.
The PS2 version is fully voiced and contains some new material.