Kyoko Takashima's husband goes on a business trip, leaving her trembling with loneliness deep inside. But her sons react completely differently—they've been eagerly awaiting this moment. In truth, a deep, forbidden bond exists between Kyoko and her sons, something they could never reveal to her husband. From the night he leaves, nightly acts of taboo passion begin to unfold. Yet guilt and remorse toward her husband leave Kyoko unable to feel truly fulfilled. This gripping story captures her inner turmoil as she's torn between forbidden pleasure and emotional conflict.