Secret Revenge - Ane wo Koroshita Idol Group wo Buttsubu Shimasu summary: Asahi’s beloved older sister was the shining center of the nation’s top idol group, Astra. Beautiful, talented, and adored by millions, she seemed destined for an unstoppable future. But one day, everything comes crashing down. She dies suddenly—labeled as an “unfortunate accident.” The world mourns. The media moves on. But Asahi knows better. Behind the flawless smiles and glittering performances lies a rotting truth— someone in Astra is responsible for his sister’s death. Now, Asahi will infiltrate the idol industry, climb his way to the top, and expose the truth. Even if it means destroying Astra from the inside out. This is no fan’s journey. This is revenge.