Chiikawa began as a Japanese manga series by Nagano, posted online from 2020 before becoming a short anime in 2022. It follows small, cute creatures Chiikawa and Hachiware, and their friend Usagi, a loud yellow rabbit known for shouting nonsense sounds instead of speaking clearly. Clips of Usagi's outbursts spread widely on social media and fan edits, detached from specific episodes. His wualala cry became a reusable reaction sound because it captures frantic excitement in a way any viewer can understand instantly.