Genius Runner [A Detective Conan Fanfic]

I don't own the art used in this cover, credit to Umintsu in deviant art who created this awesome art which I am using as a cover. I don't own eyeshield 21 or Detective Conan either btw. With the disclaimer out of the way: Gintoki Jinsoku has always loved running, running is all he loved doing, of course, he also did other things, like play videogames, watch anime(sports anime in specific), read manga, and play card games, but running is something he's always loved doing above all those things. He dies in an unfortunate accident and gets sent to another world... Wait, why is he solving murder mysteries with a 6-year-old?