"RIDDLE JOKER" is a character song by Mayu Shikibu, performed by Junka Nishizono, with lyrics by Mayuki Harukaze, composed by Famishin, and arranged by Mamoru Mori.
| Original CD release | 2018-02-09／Vol.3 |
|---|---|
| Original song performed | Junka Saisono |
| Lyrics by the author | Mayuki Harukaze |
| Composer/Arranger | Famishin / Mamoru Mori |
| OTOTOY original song duration | 04:17 |
Original character song by Mayu
"Kyogaru Otona no Secret Labo" is the title track of the character song CD Vol.3, performed by Junka Nishizono under the name Mayu Shikibu. Mayuki Harukaze wrote the lyrics, Famishin composed the music, and Mamoru Mori arranged the music. The official short version was released on February 2, 2018, and the CD was released on February 9.
Original song, two types of accompaniment, and radio drama
In OTOTOY merchandise, after the original song at 4 minutes and 17 seconds, the same length of backing and no harmonic accompaniment are included. Track 4 is a 15-minute and 35-second mini radio drama titled "Even Older Girls Want to Fall in Love."
A 2026 stage cover
Emma Inazaki performed a cover of 'Secret Labo of the Strong-Acting Adult' during the character song performance at Yuzu Soft SongFes 2026.
Related entries
- Related works:RIDDLE JOKER
- Corresponding Characters:Mayu Shikibu (RIDDLE JOKER)
- Original Song Lyricist:Mayuki Harukaze
- Original Song Composer:Famishin
- Original Song Arranger:Mamoru Mori
References
- yuzusoft Official Channel: The SecretLabo SHORT version of the pretentious adult
- Yuzu Log: Charathon Vol.3 is on sale today
- OTOTOY: The Secret Labo streaming song list for the tough adult Secret Labo
- Famishin: Yuzu Soft SongFes 2026 Thank You Summary
- Yuzu Society: Music CD product catalog
- Yuzu Club: Character song digital release catalog
Data compiled on: 2026-10-07.