Unanswered//butterfly

Unanswered//butterfly is a science fiction animation set within Sword Art Online, a full-dive virtual reality game where dying in the simulation results in death in the physical world. Former acquaintances Emirun and Rex reunite within the game and form an alliance to survive. After a mysterious player known as the Black Swordsman kills their teammates, the two survivors seek out a renowned swordswoman named Asuna to undergo rigorous training. Their goal is to grow stronger and seek revenge against the killer in a world where other players may also be hostile.

The film was produced by Polygon Pictures and co-directed by Naohiro Yoshihira and Tadahiro Yoshihira. This project follows their 2021 film Knights of Sidonia: Love Woven in the Stars. The screenplay was written by Kyôsuke Makino alongside both directors. The voice cast features Koki Uchiyama as Rex and Tomoyo Kurosawa as Emirun, with Yoshitsugu Matsuoka as Kazuto Kirigaya and Haruka Tomatsu as Asuna Yuuki. Other credited voices include Ayahi Takagaki as Lisbeth and Yurina Amami as Lucy, among a total credited cast of 25.

Released on May 9, 2026, the movie has a runtime of 118 minutes. It blends action, adventure, and fantasy elements. On TMDB, the film holds a high rating of 9/10, though this is based on only 2 votes.