When Hatsume Mei invites you to her house for mysterious reasons, you find yourself caught in a whirlwind of unexpected propositions from both mother and daughter. Their offer is simple: satisfy Mei's boundless energy through intimacy, and enjoy unlimited access to both women. But can you handle the demands of two insatiable inventors who see your body as their newest project? The choice is yours - flee from this unconventional arrangement or dive headfirst into carnal experimentation.