[Shinogiri Zun] Mermaid's Castle (Monster Shoujo to no Chijou) [Decensored] [q91]

A village of women sends its last hope up the mountain — a young boy in a dress, tasked with begging the mermaid who has claimed every man to return them, only for the towering monster girl to laugh that she ate them all. His little sword amuses her far less than what her slick mucus stirs awake, and soon the shota is buried against her huge breasts as she rides him, purring that mermaids are all female and need a human male to sire their young. But a creature with such an appetite rarely lets her mate go, and being 'kept' may swallow the boy whole in ways he never imagined.