The highly anticipated anime adaptation of A Wild Last Boss Appeared! (Yasei no Rasu Bosu ga Arawareta!) has released its first full promotional video, offering a glimpse into the series’ action and officially revealing its opening theme song. The fantasy series is set to premiere in October 2025.
First Look at the Anime’s World and Action
The newly released promotional video provides viewers with their first extensive look at the anime’s animation quality and character designs. It showcases the protagonist, Lufas Maphaahl, in various action sequences, highlighting the dark fantasy elements and the grand scale of the world. The trailer builds anticipation for the series, which adapts Firehead’s popular light novel series.
Opening Theme Song Revealed
The promotional video also features a preview of the anime’s opening theme, titled “Level wo Agete Butsuri de Naguru” (Level Up and Beat the Laws of Nature), performed by the rock band Kishida Kyodan & The Akeboshi Rockets. The band is known for their previous work on anime opening themes, including for Gate. The music is expected to complement the intense action and fantasy elements of the series.
Key Staff and Cast
The production of A Wild Last Boss Appeared! is being handled by Studio WAO World, with Yuya Horiuchi serving as the director. Kazuyuki Fudeyasu is overseeing the series composition, and Maiko Ebisawa is responsible for character designs. Takashi Kobayashi and Shota Ueno are credited with sub-character designs, while WOWMAX is producing the anime. Technoboys Pulcraft Green-Fund is composing the music for the series.
The main voice cast includes:
- Ami Koshimizu as Lufas Maphaahl
- Yuri Usui as Dina
Additionally, several new cast members for the “Twelve Heavenly Stars” have been announced:
- Yukina Shuto as Aries
- Hisako Tojo as Libra
- Naoya Uchida as Aigokeros
- Mika Kanai as Parthenos
- Kokoro Omori as Virgo
- Shunsuke Takeuchi as Alioth
- Tomoaki Maeno as Megrez
- Daisuke Hirakawa as Merak
- Satomi Akesaka as Benetnash
Anime’s October 2025 Premiere
The A Wild Last Boss Appeared! anime is scheduled to premiere in October 2025. The anime adaptation was initially announced in August 2024. Ahead of its broadcast, a 174-second battle clip from the opening of the first episode was also released, further showcasing the animation.
About A Wild Last Boss Appeared!
The series is based on the light novel series written by Firehead and illustrated by YahaKo, which began serialization on the Shosetsuka ni Naro website in October 2015 and concluded in April 2019. Earth Star Entertainment published the print edition from February 2016 to April 2019, compiling it into nine volumes.
A manga adaptation, illustrated by Tsubasa Hazuki, started serialization on Comic Earth Star’s website in June 2017 and is currently ongoing. Both the light novel and manga are licensed in English by J-Novel Club.
The story is set in the year 2800 and follows a man who wakes up in the body of his overpowered MMO character, Lufas Maphaahl—known as “The Black-Winged Tyrant” and leader of the “Twelve Heavenly Stars”—200 years after her defeat in a player-made event in the game Exgate Online. Now, stuck in Lufas’s body in a world that has become real, and with her legacy shrouded in fear, Lufas must journey to find answers, seek out comrades, and confront the monsters unleashed upon the world after her “death.”
