Eir Aoi Aoi’s new song “Emu Kuu Ji Ji” will be the opening theme song for the TV anime “Tensei Tara Slymu Datta Koto Dai 4 Seiki”!
The opening theme song, “Emu Kuu Ji Ji” is an intense rock number with a band sound that is sure to accompany the grand scale of the world of “Tensura”!
The CD containing the opening theme song “Emu Kuu Ji Ji” for the TV anime “Tensei Tareta Slyme Datta Koto 4th Term” will be released on April 22, 2026 (Wednesday)!
The CD also includes “MONSTER,” the opening theme for the TV anime “Welcome to the Classroom of the Supreme Being: 4th Season 2nd Grade Arc 1st Semester,” making it a double-tie-in single.
In addition, a “Limited Edition with Goods” is available exclusively through the “Eir Aoi Official Fan Club ‘EIR GUILD'”. We hope you will take this opportunity to join the fan club.
Would you like to be a guildman, too?
Eir Aoi Comment
When it was decided that I would sing the opening theme song for “Tensura,” which continues to be loved around the world, I was truly surprised and, more than anything, excited to be a part of the project.
The song is an intense rock number that is in keeping with the grand scale of the work. I hope you will enjoy it along with the anime.
Product Details
Release date: Wednesday, April 22, 2026
Title: “MONSTER”, opening theme song for TV anime “Welcome to the classroom of Jiritsu Jisshou Shijo no Kyoshitsu” 4th Season 2nd Grade Arc 1st Semester / “Ekuu Joto”, opening theme song for TV anime “Tensei Tara Slymu Datta Koto 4th Season” [Artist disc] / [Youmi disc] / [Tensura disc]
Artist: Aoi Eir
Part number: LACM-24832 / LACM-24833 / LACM-24834
Price:
[Artist disc] 2,750 yen (10% tax included) / 2,500 yen (tax excluded) https://lnk.to/LACM-24832
Yomimi disc] 1,980 yen (10% tax included)/1,800 yen (tax excluded) https://lnk.to/LACM-24833
Tensura Disc】1,980 yen (10% tax included)/1,800 yen (tax excluded) https://lnk.to/LACM-24834
[Artists’ Disc INDEX]
1. monster
(Opening theme for TV anime “Welcome to the classroom of merit supremacy 4th Season 2nd Grade Arc 1st Semester”)
Words by Eir Composed and arranged by GAK-amazuti-.
2. emu ku ji ji
(Opening theme song for the TV anime “Tensei wa Slyme datte koto 4th season”)
Lyrics by RUCCA, music composed and arranged by Ayato Shinozaki and Ryosuke Tachibana.
3. DRUM
Lyrics by Masami Kakinuma, music composed and arranged by yoma
4. decay
lyrics by Eir music composed and arranged by Ryo Maruta (Arte Refact)
5. monster (Instrumental)
6. pictorial matter (Instrumental)
7. drum (Instrumental)
8. decay (Instrumental)
[Yojitsu disc INDEX]
1. monster
(Opening theme for TV anime “Welcome to the classroom of merit supremacy 4th Season 2nd Grade Arc 1st Semester”)
Words by Eir Composed and arranged by GAK-amazuti-.
2. emu ku ji ji
(Opening theme song for the TV anime “Tensei wa Slyme datte koto 4th season”)
Lyrics by RUCCA, music composed and arranged by Ayato Shinozaki and Ryosuke Tachibana.
3. decay
lyrics by Eir music composed and arranged by Ryo Maruta (Arte Refact)
MONSTER (Instrumental)
5. Empty Sky (Instrumental)
6. Decay (Instrumental)
[Rolling slab INDEX]
1. emu ku ji ji
(Opening theme song for the TV anime “Tensei wa Slyme datte koto 4th season”)
Lyrics by RUCCA, music composed and arranged by Ayato Shinozaki and Ryosuke Tachibana.
2. monster
(Opening theme for TV anime “Welcome to the classroom of merit supremacy 4th Season 2nd Grade Arc 1st Semester”)
Words by Eir Composed and arranged by GAK-amazuti-.
3. DRUM
Lyrics by Masami Kakinuma, music composed and arranged by yoma
4. pictorial matter (Instrumental)
5. monster (Instrumental)
6. drum (Instrumental)
■Manufacturer’s privilege contents
A4 clear file
*[Yosami disc]/[Tensura disc] will be designed using the copyright of each jacket.
<Stores eligible for manufacturer’s privilege
All animate stores in Japan (including animate mail order)
All Gamers stores (including online store)
TSUTAYA RECORDS (excluding some stores)
Amazon.co.jp
Seven Net Shopping
Joshin Diskopia (including Joshin web store)
HMV,HMV&BOOKS online
WonderGOO/Shinseido *Excluding some stores
Yodobashi Camera
Sofmap and Animega (excluding some stores)
Bic Camera *Excluding some stores
Toranoana (including mail order/Ikebukuro store may only take reservations)
Mellon Books (including mail order)
knitting
Mr. Red Bear.
Neo Wing
■Bonuses by corporation
A-on STORE/A-on STORE Powered by A!SMART: A5 artist card
animate: L-size bromide
Amazon.co.jp: L-size bromide
Gamers: L-size bromide
Tower Records (excluding some stores): L-size bromide Neowing 2L size bromide
Rakuten Books: Smartphone size bromide 89mm x 63mm