Kenta, who was adopted by the Tachibana family, was unable to adapt to his new environment and ran away from home. Exhausted by his lonely life in Tokyo, he returns home for the first time in several years and is greeted by his sister-in-law, Mary, who was the only one who had ever shown any interest in him. However, she had already gotten married and then unfortunately lost her husband in an accident, leaving her a widow. As they spend their days together again, Kenta seeks out each other's passion, as if to make up for lost time... and Mary seeks out her own loneliness.