I am the Director of "School Brain Battle": How a Self-Proclaimed Background Character Scripts the Ultimate OP Hero from the Shadows

Teio Academy—a school where everything is decided by gaming duels. For me, Kanata Tanaka, the personification of a 'mob' character, my goal isn't to rise to the top! My mission is to remain in the shadows and 'direct' the strongest transfer student from the underworld, Kiritani, to reach the heights of a "Ultimate Protagonist!" ...Or so it was supposed to be. But why the heck am I the one standing out now...!?