Who composed 'on the rocks'?

OSTER project composed, arranged, and wrote the lyrics for 'on the rocks'.

Which VOCALOIDs sing 'on the rocks'?

The song features MEIKO and KAITO, two of Crypton Future Media's earliest VOCALOID voicebanks, performing a duet.

When was 'on the rocks' added to maimai?

It debuted in maimai DX UNiVERSE on February 25, 2022 in Japan, on July 1, 2022 in the Asian version, and on April 21, 2023 in the Chinese version (舞萌DX 2022).

What level is the Master chart for 'on the rocks'?

The Master chart is level 12+ with a difficulty constant of 12.8, designed by Jack. It contains 672 notes with a heavy emphasis on Slide patterns.

Who designed the charts for 'on the rocks' in maimai?

The Expert chart was designed by はっぴー (Happy) and the Master chart was designed by Jack.

What is the song 'on the rocks' about?

The lyrics describe a narrator escaping the suffocation of office routine, wandering into a nightlife district, and embracing the uninhibited, cocktail-fueled energy of the night, with recurring imagery of drinks, desire, and shedding one's daytime identity.

Is 'on the rocks' an original song or a cover?

It is an original VOCALOID song by OSTER project, first uploaded to niconico (sm23954284) before being added to maimai DX UNiVERSE.

on the rocks, OSTER project (MEIKO & KAITO) maimai DX UNiVERSE...

All songs

Overview

on the rocks is a VOCALOID original song by OSTER project, featuring two of Crypton Future Media's earliest voicebanks, MEIKO and KAITO, in a duet. The track was added to maimai でらっくす UNiVERSE on February 25, 2022, under the niconico & VOCALOID genre category. OSTER project handled composition, arrangement, and lyrics, delivering a driving pop-rock sound at 150 BPM that mirrors the song's lyrical theme of escaping daytime routine for the electric anonymity of the night. The title "on the rocks" refers to liquor served over ice, a motif woven through the lyrics alongside imagery of cocktails, glances exchanged in a crowded bar, and the thrill of shedding one's buttoned-up self after dark. The song originally appeared on niconico video (sm23954284) before being added to the maimai arcade series. In the Asian version of UNiVERSE, the track arrived on July 1, 2022, and it reached the Chinese version (舞萌DX 2022) on April 21, 2023. The in-game Master chart, clocking in at level 12+ (difficulty constant 12.8) with 672 notes and a heavy slide emphasis, was designed by Jack, while the Expert chart (level 8+, constant 8.6) was designed by はっぴー.

Videos

Official PV

Open

Master chart

Open

Expert chart

Open

Charts

DX

BASIC

1(1)

94 notesDesigner: -|Tap 70Hold 13Slide 2Touch 7Break 2

YouTube

ADVANCED

6(6)

259 notesDesigner: -|Tap 197Hold 20Slide 14Touch 26Break 2

YouTube

EXPERT

8+(8.6)

420 notesDesigner: はっぴー|Tap 330Hold 49Slide 21Touch 10Break 10

YouTube

MASTER

12+(12.8)

672 notesDesigner: Jack|Tap 549Hold 17Slide 76Touch 27Break 3

YouTube

Trivia

The song is a duet between MEIKO (released 2004) and KAITO (2006), two of the earliest Japanese VOCALOID voicebanks. Their pairing in an original song is notably less common than Miku-based duets, making this track a relative rarity in the wider VOCALOID catalog.
The title 'on the rocks' is a bartending term for spirits poured over ice cubes. The lyrics weave cocktail and nightlife imagery throughout, 'a cocktail of emotions,' 'bold through the glass', reinforcing the song's theme of nocturnal liberation.
OSTER project is a well-known figure in both the VOCALOID doujin scene and the BMS (Be-Music Source) community, recognized for a jazz-inflected electronic-pop style and multiple contributions to the maimai series.
The Master chart, designed by Jack, features 76 Slide notes out of 672 total, a notably high slide density for a level 12+ chart, reflecting Jack's design signature of slide-heavy patterns.
The Expert chart was designed by はっぴー (Happy), a veteran maimai notes designer whose charts are known for clean, rhythmically intuitive patterning.
The song originally premiered on niconico (sm23954284) before its inclusion in maimai, following the standard pipeline for the niconico & VOCALOID genre category.
The in-game jacket art depicts a stylized cocktail glass against a moody, neon-accented backdrop, visually echoing the song's late-night bar atmosphere.

FAQ

Who composed 'on the rocks'?: OSTER project composed, arranged, and wrote the lyrics for 'on the rocks'.
Which VOCALOIDs sing 'on the rocks'?: The song features MEIKO and KAITO, two of Crypton Future Media's earliest VOCALOID voicebanks, performing a duet.
When was 'on the rocks' added to maimai?: It debuted in maimai DX UNiVERSE on February 25, 2022 in Japan, on July 1, 2022 in the Asian version, and on April 21, 2023 in the Chinese version (舞萌DX 2022).
What level is the Master chart for 'on the rocks'?: The Master chart is level 12+ with a difficulty constant of 12.8, designed by Jack. It contains 672 notes with a heavy emphasis on Slide patterns.
Who designed the charts for 'on the rocks' in maimai?: The Expert chart was designed by はっぴー (Happy) and the Master chart was designed by Jack.
What is the song 'on the rocks' about?: The lyrics describe a narrator escaping the suffocation of office routine, wandering into a nightlife district, and embracing the uninhibited, cocktail-fueled energy of the night, with recurring imagery of drinks, desire, and shedding one's daytime identity.
Is 'on the rocks' an original song or a cover?: It is an original VOCALOID song by OSTER project, first uploaded to niconico (sm23954284) before being added to maimai DX UNiVERSE.