Cursed into Futanari: The Lewd Sister's Impossible Adventure

A fantasy adventure game where the protagonist Nina, a snobbish fashionable girl, is cursed by a succubus and transformed into a futa. She must journey to lift the curse while battling lust-driven monsters and meeting seductive NPCs. The game features turn-based combat with erotic defeat scenes, transformation-based status ailments (parasitism, tentacle restraint, size changes), and sexual encounters with various female characters met throughout the adventure. Gameplay revolves around overcoming humiliating combat losses, managing corruption mechanics, and pursuing romantic/sexual interactions with allies and other characters while searching for a way to break the curse.