The upcoming television anime adaptation of Aki Akimoto’s Mechanical Marie manga has revealed its opening and ending theme song performers, heightening anticipation for its October 2025 debut. According to the official website of the Mechanical Marie anime, Harutya will perform the opening theme song titled Honto to Uso (Truth and Lies), while Nao Tōyama, voicing the titular character Marie, will perform the ending theme song Cross Heart ~Itsuwari no Nai Kimochi (Feelings With No Lies). The series is set to air on Tokyo MX, YTV, and BS Fuji, with Crunchyroll streaming the anime worldwide, excluding Asia but including India and the Indian subcontinent.
The anime, directed by Junji Nishimura (Bakuon!!, 1989 Ranma ½, The Fire Hunter) at studios Zero-G and Lieber, features a talented production team. Mariko Kunisawa (Berserk of Gluttony, Tohai: Ura Rate Mahjong Tohai Roku) oversees the series scripts, while Yōko Kikuchi (The Demon Prince of Momochi House, Carole & Tuesday second key animator) designs the characters. The music composition is handled by Yasuharu Takanashi (Fairy Tail) and Johannes Nilsson (Gushing Over Magical Girls), promising a dynamic soundtrack to complement the series’ unique blend of action, romance, and comedy.
Check out the previously-released trailer for Mechanical Marie:
Here's the key visual for Mechanical Marie anime:
What is Mechanical Marie about?
Mechanical Marie, originally titled Kikaijikake no Marie in Japanese, began as a one-shot manga by Aki Akimoto in Hakusensha’s LaLa magazine in March 2020. Its popularity led to a full serialization starting in June 2020, which ran until June 2023, concluding with six published volumes. The manga has garnered attention for its quirky premise and engaging character dynamics, blending martial arts action with romantic comedy elements. Yen Press has licensed the manga for English release, with the first volume scheduled to be available on August 26, 2025. Following the original series’ conclusion, Akimoto launched a sequel manga, Kikaijikake no Marie+, in LaLa magazine on April 24, 2025, continuing the story of its beloved characters.
Yen Press provides the following description of the manga:
He was a boy. She was a girl…Can it be any more obvious? Actually, he’s not just a boy—he’s Arthur Louis Zetes, heir to the mega-rich Zetes conglomerate and a guy who absolutely despises humans. And so the powers that be had the wonderfully sane idea of hiring martial arts prodigy Marie as a robot maid and bodyguard against those with nefarious intentions for quite a tidy sum. Which is cool and all, except they forgot to mention one teensy, tiny detail…This guy dotes on inanimate objects like Marie can’t believe, so now she’s not sure which will kill her first—the assassins or his affections?!
With its October 2025 premiere approaching, Mechanical Marie is poised to captivate audiences with its blend of high-stakes action, romantic comedy, and a distinctive sci-fi twist. The announcement of Harutya and Nao Tōyama as theme song performers adds to the excitement, setting the stage for a memorable anime adaptation. Fans of the manga and newcomers alike can look forward to a visually striking and emotionally engaging series that brings Aki Akimoto’s imaginative world to life.
