Sent to live with his aunt while preparing for college entrance exams, Shinpei has long harbored quiet feelings for his aunt Nozomi. One day, he accidentally walks in on her masturbating on the sofa. Speechless and frozen in place, he's startled when Nozomi calmly says, "Come in." Obeying her invitation, Shinpei loses his virginity to the woman he's always admired. What begins as innocent affection quickly evolves into an intensely passionate and deeply intimate relationship, far beyond his imagination. It was Nozomi's genuine love for him that ultimately claimed Shinpei's virginity, marking the start of their forbidden bond.