Self proclaimed genius Hiraga Gennai is trying to make a living off her unique inventions, but none of them are selling. Her main ambition is to build a time machine to take her further into the future whilst living with a young boy dreaming of becoming a soccer star. After working all day on her time machine, Gennai becomes shocked when she learns the boy had gotten into an accident and fractured his leg, ruining his chance to be in a match the next day. Feeling guilty, Gennai reworks her time machine to take her a day into the past so she can prevent his accident from happening, allowing him to take part in his match. With the time machine broken following its use, Gennai decides she would rather focus on the present.
「人のために役に立つ発明をしたい！」そう心に決めた識神・源内は、現代においても日々発明に明け暮れるが失敗続き。唯一？の友達である少年からもあきれられる始末。
しかし、そんなある日、源内のもとに少年の事故の知らせが・・。くしくも少年は楽しみにしていたサッカーの試合の直前に事故にあったのだった。少年を助けたい一心の源内は、なんとかタイムマシンを完成させようと試みる。果たしてそれは完成するのか・・？
【登場キャラ】
識神・平賀源内（CV:工藤晴香）
