This is their second single since their major debut. The title track "WARAiNA" is a hyper smile song of historic scale in ONE N' ONLY's history, filled with overwhelming happiness and a glamorous parade-like atmosphere. The song title "WARAiNA (Waraina)" and the chorus lyric "One Right Now" create a play on words that lingers in the ear, resulting in a track overflowing with positive energy that expresses the brightness of the future ONE N' ONLY is heading toward. The Limited Edition Member Solo Version comes with a 16-page lyric booklet and one trading card (solo version / randomly selected from four kinds for each member).