This is the story of a girl with two worlds.
In a world, she is the noble eldest daughter of the Akashi family, who has the best life, but has lost her freedom.
In another world, she was an orphan of the Konoha Uchiha clan, lost her family, and was running on the battlefield.
Akashi Seihime and Uchiha Kagatsuki are two identities, but they are one person.
Day and night are the boundaries between two worlds.
This is a story that happens every day between two different but identical girls.