YOASOBI's fourth EP "THE BOOK for," arrives June 26 with a collection that captures the duo's work across multiple mediums over the past two and a half years.

The 12-track EP pulls from collaborations the unit completed with major franchises. "Orion" was written specifically for the video game Overwatch, while "UNDEAD" serves as the theme for the anime "Monogatari Series Off & Monster Season." The project also includes "Biri-Biri," an inspiration song tied to Pokémon Scarlet & Violet, and "Gekijou," which marks Ayase's first time singing lead vocals—a track created for the drama "Moshi Mo Kono Yo ga Butai Nara, Gakuya wa Doko ni Aru no Darou.")

As with previous releases in the series, "THE BOOK for," comes with YOASOBI's signature custom binder. This edition is limited and completely production-restricted, making it a collector's item for fans.

The EP includes a serial number for presale access to tickets for "YOASOBI ASIA 10-CITY DOME & STADIUM TOUR 2026-2027," which kicks off in October.

CD buyers also get shop-exclusive bonuses: custom index inserts featuring original artwork from the creators behind each song's music video and album jacket art. Twelve different designs are available depending on where you purchase, with each major retailer offering its own version.

HMV and Tower Records are running a special in-store campaign where customers receive a message and autograph-stamped receipt with purchase. The promotion is limited to select locations, so fans should check YOASOBI's official site for participating stores.

Since their 2019 debut with "Yoru ni Kakeru," YOASOBI—composer Ayase and vocalist Ikura—have consistently expanded beyond music into collaborations with anime, gaming, and visual media. This EP reflects their evolving role as storytellers across entertainment formats.