Musically, "Whatever" was described as a dance song, and is written in third person narrative. Upon its release, the track garnered mixed reviews from music critics. Critics praised Hamasaki's move from pop rock to dance music, but criticized her vocal delivery and song writing. It also achieved success in Japan, peaking at number five on the Japanese Oricon Singles Chart. The re-released single peaked at number 28 on the same chart. As of March 2016, "Whatever" has sold over 218,000 units in Japan alone and was certified gold by the Recording Industry Association of Japan (RIAJ).