Moonlighttears's manga / #time travel(1)

Nise no Chigiri

Complete | Kanshuu Idea Factory | 2000 released

Mana is a ordinary high-school student who somehow travels through time to the Sengoku Jidai (the 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 he change the future?