Kenji Akiba, a former great sage who lost his life due to his bad habits with women and was reincarnated, makes a contract with the great demon Gremory in order to become a great sage again in his original world. However, as a result of the contract, he is found by his yandere-type followers who continue to love him even after his master's death, and they chase him as if they won't let him escape...!? All the heroines are confirmed yanderes! A dangerously normal romantic comedy where you are at the mercy of a loving assassin from another world!