Secret Affair: Trespassing with Boyfriend's Cute Sister

Get ready for a steamy three-day affair! After falling deeply in love and promising marriage to Rio—his devoted girlfriend—the protagonist finds herself in an unexpected dilemma. When Rio leaves town for a business trip of three days and his sister Miru loses her keys while visiting to stay at their home, Miru immediately begins seducing the unsuspecting host. Despite feeling immense guilt over cheating on Rio (who she loves so much), Miru’s undeniable beauty and adorable charm prove irresistible. The protagonist quickly succumbs to her allure; before long is not only thoroughly drained by Miru but also developing strong feelings for her. What was supposed to be the most agonizing three days of loneliness turns into an absolute paradise. This intimate scenario showcases how temptation can bloom unexpectedly within a loving relationship. Watch as the initial guilt melts away under the weight of Miru's playful advances and stunning looks, culminating in unforgettable moments of passion. If you crave sweet, forbidden romance mixed with intense physical pleasure, this story delivers all the emotional highs and satisfying sexual payoffs you desire.