In Death: Make a Cut and Become Stronger

The protagonist travels to the world of Death and becomes a member of the Shiba clan. He can kill someone at a certain time and place, and he can become stronger with just one slash! "Hmph, although my Shiba clan has declined, it is not yet extinct!" "Kuchiki Byakuya, it's time to settle the score!" "Kurosaki Ichigo, you are just a traitor, what qualifications do you have to stop me?" "Kenpachi Zaraki, a bastard who only knows how to fight, you know nothing about my grand plan!" … I want the Shiba clan to return to the Serenity Courtyard. I want the royal family to be reborn into the world again! I want the Spirit King to return and unify the three realms! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.