With only a year left to live, 17-year-old Akito finds new meaning in life by bringing joy to a terminally ill girl who has just six months remaining.

Maori agrees to date smitten classmate Toru on the condition that they don’t fall in love. After all, she can only hold on to memories for 24 hours.

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.