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Overview

ストリーミングハート (Streaming Heart) is a VOCALOID track by DECO*27, one of the most prolific producers in the vocaloid and doujin music scenes, featuring Hatsune Miku on vocals. The song was arranged by kous and originally released on DECO*27's 2014 album Conti New. It made its rhythm-game debut in SEGA's CHUNITHM at that game's launch, then crossed over to maimai as part of the ORANGE PLUS update in September 2015, later appearing in オンゲキ bright MEMORY as well. The title plays on the dual meaning of "streaming", evoking both the live-streaming culture native to DECO*27's internet-born audience and the continuous, uncontrolled flow of emotions described in the lyrics. The lyrics themselves explore the tension between honesty and concealment, affection and aversion, returning to the refrain "アイマイにしたいのさ" ("I want to make it ambiguous"). At 210 BPM, the song drives forward at a relentless pace, and the maimai MASTER chart (designed by Jack, level 13) reflects that energy with dense tap sequences and a hefty 93-slide-note count, while the EXPERT chart by rioN offers a slightly gentler entry at 10+.

Videos

Official PV

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Master chart

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Expert chart

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Charts

STD

BASIC
3(3)
173 notesDesigner: -|Tap 157Hold 10Slide 3Break 3
ADVANCED
8(8)
293 notesDesigner: -|Tap 225Hold 33Slide 21Break 14
EXPERT
10+(10.6)
517 notesDesigner: rioN|Tap 400Hold 71Slide 24Break 22
MASTER
13(13.3)
742 notesDesigner: Jack|Tap 594Hold 45Slide 93Break 10

Trivia

  • ストリーミングハート was DECO*27's first song to appear in a SEGA rhythm game, debuting in CHUNITHM at that game's launch before arriving in maimai ORANGE PLUS three months later.
  • The song was arranged by kous, a frequent collaborator with DECO*27 who has contributed to many of his vocaloid productions.
  • The music video was produced by ががめ (gagame) and yuma saito, and was published on DECO*27's official YouTube channel.
  • In Asian English versions of maimai, the title is officially romanised as 'Streaming Heart.'
  • The MASTER chart by Jack contains 93 Slide notes, the highest Slide count across all four difficulties, contributing to its level‑13 rating and reputation as a stamina test.
  • The CHUNITHM version of the song uses a longer edit (2:20 total length) compared to the maimai version (2:11).
  • ストリーミングハート was temporarily removed from Chinese versions of maimai starting with 舞萌DX 2023, then restored on December 15, 2023.
  • The song received an ULTIMA chart in CHUNITHM LUMINOUS on January 11, 2024, making it one of the older niconico tracks to gain the highest difficulty tier in that series.
  • In maimai, the genre label was originally listed as simply 'niconico' during ORANGE PLUS, but was updated to 'niconico & VOCALOID' starting from maimai PiNK.

FAQ

Who composed ストリーミングハート (Streaming Heart)?
ストリーミングハート was composed and written by DECO*27, with arrangement by kous and vocals by Hatsune Miku. It originally appeared on DECO*27's 2014 album Conti New.
What version of maimai added ストリーミングハート?
The song was added to maimai as part of the ORANGE PLUS update on September 17, 2015.
What BPM is ストリーミングハート?
ストリーミングハート has a tempo of 210 BPM.
Who designed the MASTER chart for ストリーミングハート in maimai?
The MASTER chart (level 13, constant 13.3) was designed by Jack. It features 742 total notes with 93 Slide notes, making it one of the more demanding level‑13 charts from the ORANGE PLUS era.
Who designed the EXPERT chart for ストリーミングハート in maimai?
The EXPERT chart (level 10+, constant 10.6) was designed by rioN.
What is the meaning of the title ストリーミングハート?
The title translates to 'Streaming Heart.' The word 'streaming' carries a dual meaning: it references online live-streaming culture while also evoking the continuous, uncontrollable flow of emotions explored in the lyrics, which dwell on ambiguity between truth and lies, love and hate.
What other rhythm games feature ストリーミングハート?
Beyond maimai, the song appears in CHUNITHM (where it debuted at that game's launch) and オンゲキ bright MEMORY (added May 26, 2022). The CHUNITHM version uses a slightly longer edit of the track.