Mana and Tsukushi, childhood friends burdened by their own complexes. Although they love each other, they can't express their true feelings - both experiencing "mutual unrequited love"." Suddenly, a girl claiming to be "a girl from the future" appears before them.
What is the girl's purpose? And what will happen to the love between Mana and Tsukushi?
A girl-meet-suspense story intertwined with life, death, and children!