As Kanzaki Misuzu walks home one night, peculiar black hands drag her into an alternative world. She regains consciousness in a field and discovers that this world operates like an RPG, complete with a status screen that details her health and mana. Astonishingly, she possesses a ridiculously high amount of mana!
Despite her ability to handle herself well, being all alone in this world is quite daunting. Upon meeting some knights, she soon realizes her modern-day knowledge can be useful in the art of healing. Kanzaki boasts extensive knowledge about the human body, down to its very cells, which enables her to identify illnesses and provide treatment.
Through her unmatched healing skills, Kanzaki earns the moniker "Black Healer" and quickly becomes renowned. She sets out on an adventure in this mystical world, searching for a way back home while simultaneously uncovering the truth about the man who haunts her dreams.