Promise and Contract Sanctuary-Even if Cuckold v1,1 by Shibahu Cement

Kuru, the royal sword warrior, is ordered by the king to explore the Seiko forest, which is said to contain the altar of the god Kuseshiri.
In the middle of the investigation, he meets Umi's girlfriend, who is an ordinary person.
To help Kuru, who was injured during the investigation, Umi takes Kuru to the village where the residents of Kuseshi live.
In this village, Kuru finds what is really important to him, living with Umi.