The Virgin Hero Who Fought in the Dungeon for 20 Years Returned to the Surface Only to Find the Population of the World Has Dropped Drastically, with a Male-to-Female Ratio of 1:1000,

The legendary hero Ryuto, who vanished into the depths of a Dungeon to subjugate the Demon King, wandered inside for 20 years before returning to the surface. However, the world he returned to was one where the male population had plummeted due to the Demon King's curse, and wome…