High school peers Yuu and Haru travel between the real world and a parallel fantasy universe to help their friend Kotona, whose life is in danger.

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.

An unexpected love triangle, a failed seduction trap and an encounter that results from a misunderstanding, told in three movements to depict three female characters and trace the trajectories between their choices and regrets.