カエル娘

An amphibious monster, they infest streams and wetlands. They prefer feeding on humans, and will generally attack them in swarms. Once the man is caught, they will use their tongues to lick them to ejaculation. Their skill full use of their long tongues can easily lick their prey dry. Since there are usually many of them, their feeding never stops with a single ejaculation. If they find a particularly good male, they will sometimes mate with him as a group. The Frog Girls will take turns raping him, and will switch after every orgasm. Easily overpowered by their sheer numbers, the man will have no choice but to mate with every single one of them. After the mating is finished, the man will surely be completely exhausted. Exploiting that weakness, they will usually be taken to the Frog Girls' home and kept as a shared mate. [From In-game Monsterpedia]