もうみんなしねばいいのに (Mou Minna Shineba Iinoni, roughly "Everyone should just die already") is a Touhou Project arrange song by Raku Taniya (谷屋楽), a composer and vocalist from the doujin music circle Heta no Yokozuki (へたのよこずき). Originally released on Taniya's 2009 album Partner, the track was added to maimai MiLK on February 6, 2018 as part of the game's ongoing Touhou Project collaboration lineup. The arrangement weaves together two themes from Touhou Chireiden ~ Subterranean Animism (東方地霊殿): the Stage 2 field BGM 渡る者の途絶えた橋 (The Bridge of People No Longer Cross) and the Stage 2 boss theme 緑眼のジェラシー (Green-Eyed Jealousy), the latter being the character theme of Parsee Mizuhashi (水橋パルスィ). Taniya fuses these melodies into an aggressive 180 BPM track with shouted, raw vocal delivery characteristic of their style. In maimai, the Master chart (designed by 某S氏) has a notable revision history, it debuted at level 12+ in MiLK, climbed to 13+ during the DX+ era, and settled at 14.0 following BUDDiES, reflecting the chart's enduring difficulty relative to the game's evolving standard. The Expert chart (level 12.7), designed by 玉子豆腐 (Tamagodoufu), stands out for its dense slide patterns. An UTAGE (宴) chart was added in December 2025, carrying 1,153 notes and a sardonic designer jab at the playerbase.