When Lin Ling regained consciousness, he realized he had transmigrated, and into the body of a certain Kyubey in the Puella Magi Madoka Magica world! But every blessing carries a hidden danger: his self-awareness was on the verge of being assimilated and erased by the collective consciousness of the Kyubey species, the Incubator civilization! Fortunately! "Mythic Daluo, the eternal true self." Lin Ling seized a glimmer of hope and made a great vow. But this vow was raised to the Nth power, so Lin Ling, whose self was only temporarily preserved, had no choice but to begin a journey through various worlds to fulfill his vow and practice the Dao: a journey to fill the foundations, beams, and bricks of his castle in the sky. So... "Beautiful ladies, make a contract and make a wish!"