神様のミスで命を落とした高校生の翔は、名門貴族の長男ウィルとして異世界に転生することに。そしてある日、ハイハイで父の書庫に忍び込み、この世界に魔法が存在することを知ったウィル。早速魔法を使ってみると、なんと彼は魔力膨大・全属性使用可能のチートで――!?　元日本人の天才少年が、未知の魔法も使いまくる無双ファンタジー開幕!!

After a god screws up and accidentally takes high schooler Shou’s life, he offers him reincarnation with a gift to make up for it. Shou asks to retain all his old memories for the new life. Shou is reborn as Will, a noble’s son in a world where magic use is common and involves knowledge of kanji characters. With all his memories, he’s a brilliant toddler, and when he experiments with magic, he finds that he has an amazing talent for it! What’s more, though he was smart but unloved in his old life, in his new life he has a mother and a father who both love him deeply. His future as Will is looking very bright!