A young man, who was forced to live an unloved life by parents who considered being part of the former aristocracy to be supreme, is reborn. However, the place he is reborn into is none other than an active noble family. As he trembles in fear of his parents, he reluctantly undergoes training and unexpectedly becomes the first person ever to possess four magic cores. “Huh? Actually, maybe my parents are good people?” Determined to cherish his family and subjects who need him, he makes a decision. This is the tale of a young man who makes a contract with mythical-level monsters and unleashes his unmatched power for the sake of his family and subjects.