ド屑 (Dokuzu) is a VOCALOID original song by Japanese musician Nakiso (なきそ), who wrote the composition, arrangement, and lyrics, and programmed the Yuki Kaai (歌愛ユキ) voicebank for the vocal performance. The title is a blunt compound: the intensifier prefix ド (do-) amplifies 屑 (kuzu, "trash" or "scum") into something like "utter trash" or "complete scum", a label that the narrator simultaneously hurls at someone and wears themself. The lyrics swing between aggressive demands ("黙って私に従って", "Shut up and obey me"; "君に一切の拒否権ないよ", "You have no right to refuse") and moments of hesitation ("待ったをかけた ちょっと考えた", "I called a timeout, I thought about it a little"), tracing the contours of a manipulative relationship with an unflinching, almost confrontational honesty. Originally released on Nakiso's 2022 album 異星にいこうね (Isei ni Ikou ne, "Let's Go to an Alien Planet"), ド屑 crossed over into all three of SEGA's major arcade rhythm games over the following year. It debuted in CHUNITHM SUN PLUS in July 2023, then arrived in maimai でらっくす FESTiVAL PLUS on August 18, 2023, followed by ONGEKI bright MEMORY in February 2024. The Asian version of the maimai release briefly suffered a missing video bug upon its January 2024 launch; the issue was patched within four days. In maimai, the Expert chart bears the design signature of Luxizhel, while the Master chart (level 13, constant 13.2) was crafted by じゃこレモン (Jako Lemon). At a steady 115 BPM, the song's pace is deliberate rather than frantic, but the Master chart throws 612 notes at the player with prominent Slide formations and precisely placed Break notes that demand clean execution. The in-game unlockable titles, "お望み通りの末路です！" ("This is the ending you wished for!"), "君に一切の拒否権ないよ" ("You have no right to refuse"), and "黙って私に従って" ("Shut up and obey me"), are lifted verbatim from the lyrics, reinforcing the track's sharp, unapologetic personality at every unlock milestone.