Shouta is constantly getting in fights, but despite that, he's a nice guy. One day, while saving someone from some bullies, a weirdo samurai guy shows up and tells him he's haunting him. Now Shouta must deal with this constant spiritual companion... and all the emotions that come with him!
The ghost of a samurai has been haunting a high school boy for more than 2 years now; he has grown very attached to the boy, since he's seen him work hard despite his loneliness. I'm turn, the boy grows to like the ghost's company.