Mana is an ordinary high school student who somehow travels through time to the Sengoku Jidai (Warring States) period, and encounters Uesugi Masatora, one of the generals. He decides to protect her, while his rival Takeda Shingen targets her. With Mana knowing the outcome of this war, will she change the future?

Note: Based on an otome game of the same name.

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