Sumiko (34) is five years into her marriage. She reunited with her senior from middle school at a driving school, and after dating for a year, they married. Juggling work and household duties, she suddenly begins to sense a change in the behavior of her neighbor—the wife of the couple living next door. Hearing rumors that the neighboring couple’s relationship seems unnatural, she gradually feels a shadow creeping into her heart. Yet, lacking the courage to uncover the truth, days continue to pass. One day, seeking clarity, Sumiko embarks on a trip. When she meets a complete stranger, she trembles at the moment of their first kiss. The man gently caresses her, taking his time, then passionately overwhelms her. His words and touch melt her heart, wrapping her guilt in waves of pleasure. His cock thrusts into her soaked pussy, and in that instant, everything vanishes. Far from finding mental clarity, she is swept away by a surge of new emotions.