Mamono Musume: Slime & Scylla

Mamono Musume: Slime & Scylla is a Japanese adult fantasy visual novel and the third game in the Mamono Musume series. Like previous games in the series, it focuses on a relationship between a male protagonist and a monster girl, though in this game there are two girls to romance instead of just one. The game contains scenes with explicit sexual content, has multiple achievable endings, and includes voice acting for the significant female characters only.

This game tells the story of Aves Northden, an experienced pirate captain whose voyages are cut short when a storm separates him from his crew and strands him on a desert island. While exploring the island, Aves bumps into two other castaways: a Slime named Lime and a Scylla named Lachis, who, despite belonging to races that were once enemies of mankind, are both beautiful women who seem relatively harmless. Upon learning of a legend that the island contains a treasure that can grant one's wishes, Aves sets off on a new quest with his new companions close behind.