Five years into their marriage, the Nagata couple's relationship has deteriorated. Once kind and considerate, the husband gradually grew cold and began resorting to violence over trivial matters. One day, her father-in-law visits after a long absence. Seeing his warm and gentle demeanor once again stirs emotions within Minami. Witnessing her husband's abuse firsthand, she breaks down in tears. The father-in-law gently supports her chest and soothes her emotional wounds. Overwhelmed by his warmth, she finds herself giving in to his intense kisses and ultimately surrendering to a physical affair.