In the crowded world of rhythm‑based visual novels, few titles have managed to capture both the heart‑pounding excitement of a club night and the emotional weight of a coming‑of‑age story like . The game’s 2024 release marked a turning point for the franchise, not only because of its polished gameplay but also due to an ambitious soundtrack that fuses J‑pop sensibility with hardcore electronic production. At the centre of this sonic overhaul lies the standout track “Amelia” , a collaborative piece that appears on the special “XX Work” album. This article examines the development, musical composition, and cultural impact of the “Amelia” OST, and how it helped redefine Club Sweethearts as a benchmark for hybrid game‑music projects.