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Overview

Clattanoia is the opening theme for the first season of the anime Overlord (オーバーロード), performed by the musical unit OxT, a collaboration between vocalist/composer Masayoshi Ooishi and arranger Tom-H@ck (Tomohiro Oshima), with lyrics by hotaru. The song's title is a portmanteau likely combining "clatter" and "paranoia," matching the dark fantasy tone of the series. It was added to maimai でらっくす (maimai DX) on September 6, 2019, after debuting earlier that year in SEGA's other rhythm game CHUNITHM AMAZON. Clattanoia was removed from maimai on March 24, 2022, making it one of the early delisted songs in the DX era. The maimai version uses the shorter anime-opening cut (approximately 1:29), and its in-game video is sourced from the official music video rather than the anime's opening sequence. The song's four DX charts span Basic (Lv4) through Master (Lv12), with the Expert chart designed by 華火職人 (Kanon Oguni) featuring a notable 59 Touch notes, and the Master chart designed by はっぴー (Happy) carrying 562 notes with heavy Slide and Touch patterning at 190 BPM.

Videos

Official PV

Open

Charts

DX

BASIC
4(4)
101 notesDesigner: -|Tap 76Hold 9Slide 7Touch 7Break 2
ADVANCED
7(7)
228 notesDesigner: -|Tap 180Hold 23Slide 11Touch 6Break 8
EXPERT
10(10)
377 notesDesigner: 華火職人|Tap 258Hold 33Slide 14Touch 59Break 13
MASTER
12(12)
562 notesDesigner: はっぴー|Tap 355Hold 17Slide 96Touch 76Break 18

Trivia

  • Clattanoia was used as the opening theme for the first season of the anime Overlord (オーバーロード), which aired in 2015.
  • The song was composed and performed by Masayoshi Ooishi, with arrangement by Tom-H@ck (Tomohiro Oshima). Together they form the musical unit OxT. Lyrics were written by hotaru.
  • Clattanoia first appeared in a SEGA rhythm game on CHUNITHM AMAZON (March 2019) before coming to maimai でらっくす on September 6, 2019.
  • The song was removed from maimai on March 24, 2022, and from CHUNITHM on August 5, 2021, making it unavailable in current versions of both games.
  • The maimai version uses the shorter anime-opening cut of the song (approximately 1:29), whereas CHUNITHM uses a longer cut of the full version (approximately 2:34).
  • Despite using the anime opening audio, the in-game movie in maimai is cut from the official music video, not from the anime's opening sequence.
  • In maimai, the song is credited simply to 'OxT', without listing individual members Ooishi or Tom-H@ck.
  • The in-game title (称号) '課金アイテムだよ' ('It's a paid item'), awarded for achieving MASTER rank SS, is a meta-joke shared with CHUNITHM that acknowledges the song's availability through paid content.
  • The Master chart (Lv12) was designed by はっぴー (Happy) and features 562 notes with a dense Slide count of 96 and 76 Touch notes, distinctive for a 190 BPM track.
  • The Expert chart (Lv10) was designed by 華火職人 (Kanon Oguni) and stands out for its heavy Touch-note usage (59 notes), unusual for a Level 10 chart in the POPS & ANIME genre.

FAQ

Who composed Clattanoia?
Clattanoia was composed and performed by Masayoshi Ooishi, with arrangement by Tom-H@ck (Tomohiro Oshima). Together they form the musical unit OxT. The lyrics were written by hotaru.
What anime is Clattanoia from?
Clattanoia is the opening theme for the first season of the anime Overlord (オーバーロード), which aired in 2015.
When was Clattanoia added to maimai and when was it removed?
Clattanoia was added to maimai でらっくす on September 6, 2019, and was removed from the game on March 24, 2022. It is no longer playable in current versions of maimai.
What difficulty are the Clattanoia charts in maimai?
Clattanoia has four DX charts: Basic at Level 4, Advanced at Level 7, Expert at Level 10, and Master at Level 12.
Who designed the Clattanoia charts in maimai?
The Expert chart was designed by 華火職人 (Kanon Oguni), and the Master chart was designed by はっぴー (Happy). The Basic and Advanced charts do not have a credited designer.
Is the maimai version of Clattanoia the full song?
No, the maimai version uses the shorter anime-opening cut of the song, approximately 1:29 in length. CHUNITHM uses a longer cut of the full version at approximately 2:34.
Does Clattanoia use the anime opening video in maimai?
No, the in-game movie in maimai is cut from the official music video, not from the Overlord anime's opening sequence.
What does the title Clattanoia mean?
The title Clattanoia is a portmanteau likely combining 'clatter' (a loud rattling sound) and 'paranoia' (irrational fear), fitting the dark fantasy themes and lyrics of Overlord's first opening.