Monster Girl 1,000 [Android]

A lone warrior, bereft of his family, finds himself as the only man in a community dominated by female monsters. Entrusted with a mission by the village's fertility goddess, he must partake in a significant task to sire offspring with 1,000 of the local monster inhabitants in order to boost their numbers. Accompanying him on his quest are a companionable elf maiden and a charismatic demoness. Together, they embark on a journey into a captivating realm teeming with diverse monster women, as he endeavors to form a large and diverse assembly of companions.