A non-human reincarnation that becomes human early on might be a "wild shogun"

Isn't there? I started reading thinking I'd enjoy watching how the protagonist, who became non-human, would live as a non-human, but by episodes 2-3 they quickly became human again, and I thought, "What was the point of that non-human reincarnation setting?" This is a story about how such non-human reincarnation stories that turn human so quickly might actually be like "The Rambunctious Shogun."