Ayaka, an ordinary married woman, finds herself alone at home when her husband temporarily leaves to care for their neighbor—a close friend—who has been hospitalized for childbirth. However, she soon discovers that her husband has secretly invited another woman into their home during this time. When Ayaka confronts him, demanding remorse, he shows no sign of regret or intention to change. Instead, he begins to desire Ayaka's own body, his lust escalating beyond control. This shocking story reveals the hidden betrayals beneath everyday life and the painful transformation of love and trust within a marriage.