Taeko and her husband, Jiro, are living a peaceful existence with son, Keita. A tragic accident brings the boy's father, Park, back into her life. Taeko throws herself into helping this deaf and homeless man to cope with pain and guilt.

Yoshio is a man who works for the city's water department and live with his mother. He regularly visits to the SM Queen Miho, but he still cannot forget the legendary SM Queen Yukiko.

A pioneering roboticist awakens in 2025 after decades in cryosleep. To change the past and reunite with his adopted sister, he seeks a way back to 1995.