18+ Saikyou no Bakunyuu Kendo wo Niku Onaho Haramaseshinagara Musou suru Taima Seikatsu

Old Japan was under threat of an evil scourge. Though weak, the fellow rescued the mighty swordstress Hazuki. She mistook his motive and fell in love—offering her glorious virgin hole! Quaff from my chalice, plow my field, she urged him, happy to service her rescuer, as his dagger plunged into her flesh forging a bond of utter loyalty and love.

Thus the weak protagonist made Hazuki the great his f*ckable sponge, sperm awash in her welcoming slit. The story of their joint conquest commences!

(Source: DLsite)