Description:

A rare species called "innocence" may be the kind of animal needed for the world you desire... One day, a man from a superior caste of fox aristocrats rescues a girl from the lowest caste of mice. The girl is hiding a big secret that will shake the world... (Source: MU)

Alternative Titles:

窮鼠の契り－偽りのΩ－, A Mouse Contract, Ein schicksalhafter Bund mit dem Fuchs, Le secret de la souris, 窮途之鼠的契約, 궁서의 약속 -위장 Ω(오메가)