Hatsuru Koto Naki Mirai Yori

This is from the same publisher, writer, and illustrator who brought you the Grisaia Trilogy.
On this VN, the protagonist is a WWII Japanese pilot, who is about to do a kamikaze, he thought he was dead, but instead he was transported to a different world. While wandering on the desert, and thirsty, he collapses and is saved by a woman. As he tries to get an explanation of his location, they have a argument and the woman turns to a dragon which surprises him.
This is a story of a soldier, trying to find his way back to complete his mission, and to do that he has to find out his situation on this new and unknown world to him.