Hyakkaou Private Academy, a prestigious institution that houses students from powerful and wealthy families. Students face off against one another in gambling bets to determine their status and hierarchy within the academy. And maybe.. robot students. Well, everyone thought that was impossible. But no, it's real. Because another new student is here (after Yumeko Jabami enrolled at the Academy.) The student's name is Optimus Prime. A young soldier who unexpectedly is skilled in gambling.