Demon Slayer: Three Hundred Years Later I Will Become the Successor of Kamado

In the first second after time travel, a ghost's hand was inserted into my stomach. Five seconds after traveling through time, I remembered that this body's surname was Kamado. Ten seconds after time travel, a blond girl chopped off the ghost's head. Three hundred years ago, Wuhan was killed. Three hundred years later, someone wanted to resurrect him. And I, an avid Demon Slayer fan, traveled through time and became a descendant of the Kamado family with all the memories of the original work. The breath of the sun, I know. Twelve ghost months, I understand. I know the weakness of ghosts. The only problem is- I can't even defeat a low-level ghost now. "Then let's start from the beginning."