The son's parents divorced when he was young, and he ended up living with his mother. However, his mother remarried and built a new family, leaving the son to overhear his parents having sex every night. His heart racing at the sound of his mother's moans, one day the son sneaks into his parents' bedroom to secretly film them. But the camera is discovered by his mother, leading to an unexpected turn of events. Despite being married, the mother deeply cares for her son, while the son's best friend harbors intense feelings for her. When the best friend begins pursuing her, the mother finds herself in a difficult situation, enduring it all with patience—until she finally takes a bold action. The story unfolds with deepening relationships between the son and mother, and a growing love triangle involving the best friend.