Everything For You {Muichiro x Y/N}

Story about Y/N being a tsuguko of a hashira, Muichiro Tokito. Her ancestors have invented a new breathing style, Mist breathing, but her family is being brutally killed by a demon at young age of five. But, Urokoudaki Sakonji has been in her village, yet not in time to save other villagers but in right time to save Y/N from having the same faith as the other villagers. He takes her as his own child and secretly raises her, far from the look of his students. Him being a multitechniquer taught her Ice breathing, although he thought his other students water breathing. That fact leads to a deeper secret of her life that leads her of killing Kibutsuji. In that mission, she almost gets killed by protecting her friends, but somehow survives. Even if she is a tsuguko, her wish of wanting to protect humanity, leads to Muichiro have feelings for her but doesn't know if that is true.