→unfinished→ is the first ending theme of Accel World performed by Kotoko. The lyrics were written by Kotoko, and the music was composed by Satoshi Yaginuma of FripSide. It began in Episode 02 and ended in episode Episode 13. It was replaced by Unite. The music video features scenes switching frequently from the real world to a virtual word, in reflection of the anime's setting. Imagery of butterflies frequently appear, echoing with the avatar used by Kuroyukihime.