"cusp" is a collaborative single between Underground Hip Hop MC Hikaru Tanaka, often praised for his "authentic backpacker style," and dhrma, a beatmaker from Kakogawa City, Hyogo Prefecture, who continuously constructs a unique and experimental sound. The track juxtaposes the inner fluctuations of the mind with a morning walk, with lyrics that use vivid metaphors, while the sound blends the inorganic and organic in a meticulous yet warm manner, provoking a sense of psychological belonging. Released under the backing of the Japanese clothing brand Machunoyomogi, which values traditional Japanese culture while offering a distinctive worldview and creative designs.