Secret Cohabitation Life with My Big Sister — Milk Tea Thicker Than Blood | Erotic Intimacy & Forbidden Love Simulator Dive into the warmest and most forbidden story of 2026 — Secret Cohabitation Life with My Big Sister — Milk Tea Thicker Than Blood (original: お姉ちゃんにはナイショの同居生活——血より濃いミルクティー関係). After a mysterious sponsorship deal, their old live-streaming life is finally behind them. Now you and your beloved big sister have your own cozy apartment, money is no longer an issue, and you can live “like normal people.” But one day a mysterious Intimacy Gauge appears above your heads… and everything changes forever. Every single day becomes a tender little adventure: • Cooking breakfast together while your glances linger longer and longer • Watching movies on the same sofa, your hands accidentally brushing • Sharing secrets that no one else in the world will ever know With every level of intimacy you raise, ordinary life slowly transforms into a passionate romantic simulation — where the line between “brother and sister” and “lovers” disappears completely. Game Features: 16 full H-scenes with dynamic animations (3+ stages per scene) Switchable camera angles, real-time pose changes, and clothing removal Intimacy progress system that unlocks new events and scenes Atmospheric Unity engine with stunning CGs and lively animations Fully localized in Russian / English / Japanese (official multilingual version) This isn’t just another erotic game. It’s a heartfelt story about how blood can become less important than the feelings that bloom in the quiet of your shared home. Tender, passionate, and incredibly close. WARNING: 18+ only. Contains incest themes, explicit adult content, and intense romantic scenes. Perfect for fans of: cohabitation simulators, forbidden onee-chan romance, atmospheric erotic visual novels, tender R18 dating sims, and intimate life simulators. More information