人里に下ったアタイがいつの間にか社畜になっていた件 (Hitozato ni kudatta atai ga itsunomanika shachiku ni natteita ken) is a BMS-originated track by nekomirin and nora2r featuring vocalist Mao Komiya, added to maimai with the MURASAKi PLUS update on August 3, 2017. The song debuted in the 2015 BMS contest THE BMS OF FIGHTERS ULTIMATE (BOFU2015) under the circle name のらねこさい, where it placed 23rd overall with the deliberately absurd genre tag "JAPANESE COMPANY'S SLAVE CORE." The track's title translates roughly to "The Case of Me, Who Went Down to the Human Village and Somehow Became a Corporate Slave", a premise carried through its lyrics with a mix of workplace gallows humor, programming metaphors (while(1) infinite loops, break statements, /* comment */ syntax), and sharp satire of Japan's black-company culture. The lyrics depict a fox-eared protagonist trapped in an exploitative office job, with call-outs to unpaid overtime, specification-less requirements, and the Kafkaesque logic of corporate loyalty. The arrangement drives at a consistent 180 BPM, pairing nekomirin and nora2r's production with Mao Komiya's high-energy vocal delivery. The original BOFU2015 music video was created by 出前 and くるみあべし. In maimai, the song has seen multiple level adjustments across version updates, reflecting the evolving difficulty curve of the game. Notably, it retains STANDARD-style charts without Touch notes, characteristic of its pre-DX era origin. An extended version titled もっと！人里に下ったアタイがいつの間にか社畜になっていた件 appears on the compilation album のらねこさい まとめ.