Lalang cp, the protagonist is not the original Hyakkimaru, and the main character is Wenye World in the early stage. There is a plot of returning to the original world to restore body organs.
Lan Tang, who mainly focuses on CP, sincerely recommends that you stop when you see the protagonist. (Chapter 374) I would rather be. What I wrote above is really nice and highly recommended. The later 19th century story is okay, but very fragmented. In the end, I returned to Wenye and Lan Tanghe, but it was a bit broken.
The protagonist interacts with the Wenye world in the form of a game in the early stage, so his abilities are very buggy. Later, the world merged, with CP but very few emotional lines.