Matsumoto Yuu, a systems engineer, was transported to another world along with his pet cat, Orihime. There, he meets Annemarie, an impoverished noblewoman, and decides to help rebuild her territory... Using his programming knowledge and skills, he works hard to restore the land! Moreover, Orihime also gains an incredible power... What will happen next?! The revolutionary fantasy of a development-loving systems engineer begins in grand fashion!