Makoto Sugiura was treated like a s*ave and ridiculed as the manager of the popular idol group ‘Charlotte’. One day, one of the members gets injured just before an important live performance. Sugiura, who had no choice but to perform in place of the injured member, overwhelms both the members and the fans with his perfect performance of one of Charlotte‘s songs and dances, which he had created all by himself. Unintentionally, Sugiura becomes the legendary idol ‘X’ and hides his identity to become the manager of a beautiful girl idol group at an entertainment school. However, all the talk at school is about the mysterious charismatic idol ‘X’. While stressfully trying to keep his identity as ‘X’ from being revealed, Sugiura struggles with his work with the beautiful idol girls…