"Imagination" from the anime Haikyuu!! is a lively and uplifting song originally performed in the key of G major. Featured as the ending theme for the anime, the song captures the spirit of determination and teamwork portrayed in the series. It is performed by Japanese band SPYAIR, with lyrics by MOMIKEN and music composed by UZ. An interesting fact is that "Imagination" was well-received by fans of the anime for its energetic melody and inspiring lyrics, serving as a fitting conclusion to each episode. The melody features catchy guitar riffs, driving rhythms, and spirited vocals, creating a sense of excitement and motivation for viewers.