The official accounts for the upcoming anime adaptation of Firehead and YahaKo’s A Wild Last Boss Appeared! light novel series have unveiled its first full promotional video, offering a glimpse into the dark fantasy isekai world and revealing its opening theme song. The series is set to premiere in October 2025.
The newly released promo video features the opening theme song titled “Level wo Agete Butsuri de Naguru” (Level Up and Beat the Laws of Nature), performed by the band Kisida Kyodan & The Akebosi Rockets.
Key Details from the Latest Reveal
The promotional video provides a significant update for fans eagerly awaiting the anime’s debut. Beyond showcasing the animation style by Studio Wao World, it confirms the musical direction for the series’ opening.
Premiere Date and Production Team
A Wild Last Boss Appeared! is slated for an October 2025 release. The anime is being directed by Yūya Horiuchi at Studio Wao World, with WOWMAX handling general production. Kazuyuki Fudeyasu is overseeing the series scripts, while Maiko Ebisawa is responsible for character designs. Technoboys Pulcraft Green-Fund is composing the music for the series.
Voice Cast Highlights
The anime stars Ami Koshimizu as the enigmatic protagonist Lufas Maphaahl and Yuri Usui as Dina. Additional cast members revealed include Shunsuke Takeuchi as Sword King Alioth, Tomoaki Maeno as Wise King Megrez, Daisuke Hirakawa as Sky King Merak, and Satomi Akesaka as Vampire Princess Benetnasch.
The Story of “A Wild Last Boss Appeared!”
The anime adapts the popular light novel series by Firehead, which began serialization on the Shōsetsuka ni Narō website in 2015. J-Novel Club licenses the light novel series in English and describes the plot as follows:
The year is 2800, and Lufas Maphaahl – known as The Black-Winged Tyrant, Great Conqueror, and leader of the Twelve Heavenly Stars – has returned. The story follows a man who wakes up in the body of his overpowered MMO character, Lufas, 200 years after her defeat during a player-made event in the game, Exgate Online. Now, stuck in her body in a world that has become real, Lufas must journey through Exgate, seeking answers, potential comrades, and confronting the monsters unleashed upon the world after her “death.”
Anticipation Builds for Anime Expo 2025 Premiere
NBCUniversal Entertainment Japan confirmed that the world premiere of the A Wild Last Boss Appeared! anime will take place at Anime Expo 2025 on July 5 at 10:30 a.m. PDT. This early screening highlights the studio’s confidence in the title and its global appeal, positioning it as a significant release for the Fall 2025 anime season. Ryō Hino, manager and anime producer from NBCUniversal Japan, encouraged fans to pay close attention to the music, noting that the background music uses a film scoring method where it is composed to match specific scenes after the anime is created.
