In my world (Prod. KOTONOHOUSE) is a pop track born from the 電音部 (DEN-ON-BU) project, a multimedia dance-music franchise by Bandai Namco Entertainment centered around fictional school clubs dedicated to electronic music. The song is performed by three characters from 帝音国際学院 (Teion International Academy), Karin Houou (voiced by Kana Sukoya), Mitsuki Seto (voiced by Sister Claire), and Lucia Taiga (voiced by Sara Hoshikawa), each representing a distinctive vocal personality that intertwines across the track. Production is handled by KOTONOHOUSE, a Japanese producer active in the dance and club music scene, with composition and lyrics contributed by RANASOL. Released as a single in 2021, the track arrived in maimai でらっくす FESTiVAL on January 6, 2023 as part of the POPS & ANIME category, bringing the DEN-ON-BU sound to arcade rhythm-game audiences. The song's bright 160 BPM tempo and polished pop production carry themes of self-affirmation and confidence, reflected in the in-game title achievement "世界はもう既にこの手の中" ("The world is already in these hands"), unlocked by earning rank S on the EXPERT chart. The MASTER chart, designed by Jack at level 13 with a constant of 13.3, delivers a dense 743-note layout that emphasizes Slide and Touch patterns, while the EXPERT chart by アマリリス offers a more measured introduction to the track's rhythm at level 10.