Chris, the third son of the Ford family, was expected to have a bright future, but he grew up deemed incompetent. He earned the nickname "Blockhead" and, due to his perceived lack of ability, was disinherited at the young age of twelve.

Later, Chris discovers a mysterious grimoire in the archives—an artifact that allows him to adjust parameters and modify various forms of magic. Having always been fascinated by magic, Chris is thrilled. He begins customizing spells and casting them one after another.

As Chris lives a carefree life experimenting with magic, difficult problems begin to arise around him. However, Chris remains oblivious to them. Without even realizing it, he ends up solving these problems one by one.