With the Devilish Her

With the Devilish Her is a cohabitation romance simulation game where you spend three weeks living with Marina, your friend's younger sister who has recently become orphaned. The game focuses on developing your relationship with Marina through daily interactions and intimate moments, featuring a progressive system that builds from foreplay to deeper physical experiences. Gameplay includes extensive customization—dress Marina from over a million outfit combinations—and unlock additional content through an Endless Mode that continues after the main story concludes. The experience is rendered in smooth Live2D animations fully voiced in Japanese, with detailed adult content and a management/trainer mechanic.