The Multiverse Expands: Isekai Quartet 3 Debuts Creditless Opening, Reveals New Cast Members

The highly anticipated third season of Isekai Quartet has officially launched, treating fans to an exhilarating, creditless opening animation that promises more chibi-style comedic chaos. This beloved crossover series, renowned for bringing together characters from Japan's most popular isekai franchises, continues its tradition of delightful absurdity, and the newly released opening video is a testament to its signature charm.

Titled “Isekai Concerto,” the vibrant musical number is performed by none other than the in-universe cast, featuring the collaborative talents of voice actors Satoshi Hino (Ainz), Jun Fukushima (Kazuma), Yuusuke Kobayashi (Subaru), and Aoi Yuuki (Tanya). Their combined performance breathes life into the catchy theme, instantly immersing viewers in the whimsical world of Isekai Quartet 3. Fans will want to pay close attention to the video's thrilling conclusion, which unveils special appearances by Naofumi from The Rising of The Shield Hero and Cid from The Eminence in Shadow. Their inclusion signals a significant expansion of the already star-studded ensemble, confirming their roles in Season 3 and exciting devotees of these popular sagas.

The new season boasts an impressive lineup, with characters from Overlord, KONOSUBA – God’s Blessing on This Wonderful World!, Re:Zero – Starting Life in Another World –, The Saga of Tanya the Evil, The Rising of The Shield Hero, and The Eminence in Shadow all sharing the spotlight. This expansive universe is masterfully brought to life by Studio PuYUKAI, under the expert direction and scriptwriting of Minoru Ashina. Character designs by Minoru Takehara and a lively score from Ruka Kawada further enhance the series' distinct visual and auditory appeal.

Isekai Quartet 3 made its grand debut on October 13, 2025, at 10:30 p.m. JST on Tokyo MX and was simulcast via Japan’s d Anime Store. Subsequent broadcasts are scheduled across BS11, MBS, and AT-X. For its eager international audience, the series commenced streaming on major platforms starting October 16, solidifying its status as a global anime event. The show’s enduring appeal stems from its clever comedic tone, which playfully lampoons common isekai tropes, coupled with a visual style that accentuates the characters’ exaggerated, endearing designs. The creditless opening, free from distracting on-screen text, offers an uninterrupted spectacle of dynamic character interactions and subtle nods to the source materials. Complementing the lighthearted spirit of the show is the ending theme, “Kimi Iro, Boku Iro,” performed by Konomi Suzuki and Kashitarō Itō.

As excitement mounts for the forthcoming episodes, this captivating creditless opening serves as a tantalizing glimpse into the madcap misadventures that await viewers. Whether you're a devoted follower of Overlord, KONOSUBA, Re:Zero, The Saga of Tanya the Evil, The Rising of The Shield Hero, or The Eminence in Shadow, or simply enjoy clever meta-humor, Isekai Quartet 3 promises an entertaining and nostalgic journey through the diverse worlds of isekai.