The Hawk God and The Pitiful Sacrifice

Due to an accident, Rui has an impaired leg and is chosen by the village as a sacrifice to appease the gods and call for rain, leaving his sister behind. In the afterlife, Rui pleads with the local god Murakumo to make it rain. Not only does Murakumo refuse, but he also forces himself upon Rui.

"If you don't like it, then hurry up and leave. Please..."
Although Rui is hurting, Murakumo's pained expression makes him wonder what lies beneath it. A sweet, heartbreaking love story of two radiant souls who save each other.

(Source: MangaPlaza)

Note: Includes one extra chapter.