Under a clear blue sky, a loving couple strolled along a quiet rural path. The Takashima couple were happily visiting the husband's family home, walking hand in hand with smiles on their faces. However, Misuzu, the wife, couldn't stop thinking about Kenji, her husband's younger brother, who lived shut away on the second floor. For thirteen long years, he had lived in isolation, a depraved young man rotting in a filthy, decaying room. That day, after soaking in the bath to relieve the fatigue of their long journey, Misuzu stepped out of the bathroom—only to find Kenji emerging from the kitchen refrigerator, ravenously devouring food. But in that moment, his eyes locked onto her—her radiant, alluring body, a woman from Tokyo—and something inside him shifted dramatically.