"For only what is the difference between the two? For only what is the difference between life and death?" Kana Kimura is a typical 16 year old high schooler, she blends in with her classmates, she studies well, her parents are wealthy... The only thing "special" in her is the fact that she owns an ability that allows her to transfer her consciousness into a different dimension-the Border between Life and Death. Faced with the soul of her dear friend, stuck in the unknown world, she finds a way to "bring him back to life", determined to defy the boundaries of existence. Kana's normal life begins to shatter the more she tries to forget about her past, about her reality.