おちゃめ機能 (Ochame Kinou, "Mischievous Function") is a Kasane Teto UTAU original by ゴジマジP (GojimajiP) that arrived in maimai PLUS on December 13, 2012. The track holds a landmark place in vocaloid history: on November 24, 2010, it became the first UTAU song ever to reach 1 million plays on niconico, a milestone it achieved faster than any other UTAU track until 2023. GojimajiP is a pen name of the prolific composer LamazeP (ラマーズP), who distinguishes his work by using the LamazeP alias for VOCALOID compositions and GojimajiP for UTAU tracks. The song was originally released on the album replay in 2010. Within maimai, its in-game genre classification shifted over the years, starting as VARIETY, moving to niconico, and eventually settling under niconico & VOCALOID. The Master chart, designed by mai-Star at level 13+ (constant 13.6), packs 499 notes with a heavy Tap emphasis, while the Expert chart from 譜面-100号 leans into Hold patterns. A 逆-direction Utage chart was added during the MURASAKi PLUS era. Outside maimai, the song is widely known as the source of the "吹っ切れた" (fukkireta) meme on niconico, where creators produce videos of characters dramatically snapping or breaking free, set to the track.