"Oboetete ii yo/DuDiDuWa*lalala" (覚えてていいよ/DuDiDuWa*lalala) is the first single released by Kotoko produced by I've Sound and under the Geneon Entertainment label. "DuDiDuWa*lalala" was used as the ending theme for the anime Tweeny Witches. The single reached number fifteen on the Oricon weekly charts and charted for seven weeks.[1]