Yumi, a married woman, had been happily living with her husband and daughter after finally purchasing their dream home following twenty years of marriage. But just two weeks later, her husband was transferred for work, leaving her alone in the empty house. Overwhelmed by loneliness and anxiety, Yumi began confiding in Yuki, a part-time coworker who was also a college student. As a recent transplant, Yumi faced countless daily struggles, and Yuki always responded with gentle kindness. Gradually, Yumi found her heart healing in Yuki's warmth—yet remained unaware of the younger woman's true feelings and intentions. As those feelings come to light, Yumi will realize she can never go back to her husband.