While preparing breakfast, mother Tsubaki notices her son waking up in obvious discomfort, his lower body visibly swollen. Lately neglected by her husband and forced to relieve herself through daily masturbation, Tsubaki finds her groin tingling with arousal at the mere thought of her son's thick morning wood. That night, her son accidentally catches her in the act of masturbating and confesses that his morning erections are because his mother's voluptuous, sensual body turns him on. From then on, the two begin craving each other's bodies at dawn, eventually making love. A moment filled with warmth and pure emotion that strikes deep in the heart. A delicate, heartbreaking story where the bond between mother and son intertwines with sexual desire.