The only special skill of Tamura, a plain and unglamorous Announcer, is "never stumbling over a script." Such a man reincarnates into the body of Phil, a boy with zero magic power, in an Isekai. No overpowered abilities, no Cheat—it seemed another plain life was beginning... but just then, Tamura encounters a "Forbidden Book." Recorded there was the forbidden sorcery "Chanting Magic," where stumbling over the words means losing your life. This magic, deemed impossible to chant and made a taboo due to being "long-form and having a time limit," could be recited by Tamura, who "never stumbles over a script"――!? If you stumble, your life ends!! An unprecedented Chanting Magic Fantasy raises its curtain!