Mana and Tsukushi are childhood friends who each has a complex about their relationship. Although they care deeply about each other, both of them are afraid to reveal their true feelings. Suddenly, a girl who calls herself "the girl from the future" appears before them and their unrequited love. What is the girl's purpose? And what will become of Mana and Tsukushi's relationship? A girl-meet-suspense story intertwined with life, death, and children!

(Source: Kadokawa, translated)