While it appears you may be conflating this with "One Piece"—where Episode 8 features and Chouchou the dog defending a pet shop from Buggy the Clown —the specific "piece" of the story in Hitori no Shita Episode 8 focuses on:
: Chulan joins the Tianxia Group under the guise of wanting to learn more about his grandfather’s past and his own powers. Hitori no Shita: The Outcast Episode 8
If you were looking for information on a later season, (released in early 2026) involves Wang Zhenqiu solving riddles left by Wu Gensheng to uncover secrets in the 24 Valleys . While it appears you may be conflating this