On the day that Shinjo was dealt a terrible hand by life, and he faced irreversible physical and mental damage, he obtains a mysterious ability that completely changes the course of his life and his perception of others. Until he meets the "popular girl" Ai Hirano...

Nisetsune is a story about "nurture vs nature." Due to tragic circumstances. A half-kitsune named Touki has to decide his moral views and choose between destruction or a path of happiness.