Eir Aoi Kicks Off New Chapter with Lantis: New Song Selected as Opening Theme for Classroom of the Elite 4th Season: Second Year, First Semester

Eir Aoi will release a new song through Lantis, the music label operated by Bandai Namco Music Live. The track, titled “MONSTER,” has been selected as the opening theme for the TV anime Classroom of the Elite 4th Season: Second Year, First Semester.

“MONSTER” combines Eir Aoi's signature intense sound with elements of digital rock to create a bold, hard-hitting track worthy of marking this new chapter in her career. The lyrics were written by Eir Aoi herself as a tribute to the series.

A CD featuring “MONSTER” is set for release on April 22, 2026. It will be available in three editions—Type A, Type B, and Type C—and will include the title track along with three additional new songs. Further details will be announced at a later date.

Comment from Eir Aoi

I'm delighted to be singing the opening theme for Classroom of the Elite, a series loved by many people. I'm filled with gratitude for the opportunity to be involved in its production.

This song is quite intense, with the theme of how Ayanokoji-kun is seen as a “monster” by those around him. I hope you'll enjoy this track, where I explore a new side of my music through a digital rock sound, along with the anime.

Product Information
“MONSTER,” OP theme of Classroom of the Elite 4th Season: Second Year, First Semester
Lyrics: Eir Aoi
Composition/Arrangement: GAK-amazuti-
Release Date: April 22, 2026

Formats:
[Type-A] LACM-24832, ¥2,750 (tax included)
[Type-B] LACM-24833, ¥1,980 (tax included)
[Type-C] LACM-24834, ¥1,980 (tax included)

*“Monster” is included on all formats

Profile:
A Japanese singer-songwriter who has earned passionate support from anime fans both in Japan and overseas for her powerful, soaring vocals and exceptional expressive range. Her music is marked by emotionally stirring lyrics and melodies, as well as dynamic live performances.

She has successfully performed four times at Nippon Budokan and appeared at Yokohama Arena, in addition to staging concerts in 15 countries and regions worldwide, including in Paris, London, Shanghai, and San Francisco. She continues to enjoy a strong international fanbase.

Official Website: https://aoieir.jp/
X: https://x.com/eir_ruru2
Instagram: https://www.instagram.com/aoieir

Copyright:
©Syougo Kinugasa,PUBLISHED BY KADOKAWA CORPORATION/YOUZITSU4 PARTNERS