Last winter, Kunio's father-in-law suddenly passed away, leaving him to live with his wife and mother-in-law. One day, Kunio learns his wife's department transfer has led to a pay cut, and her attitude toward him drastically changes—she becomes cold, constantly ignoring him and speaking harshly. Worried about Kunio's growing distress, his compassionate mother-in-law comforts him, saying, "My daughter is sorry. You're not at fault, Kunio." Touched by her kindness, Kunio loses control, impulsively pins her down, and takes her right then. Their family bond takes a shocking, forbidden turn.