The Eminence in Shadow

"The Eminence in Shadow" (陰の実力者になりたくて!, Kage no Jitsuryokusha ni Naritakute!) is a Japanese light novel series written by Daisuke Aizawa and illustrated by Tōzai. The story follows Minoru Kageno, who aspires to be a mastermind working from the shadows. After being reborn in a magical world as Cid Kagenou, he creates a secret organization called Shadow Garden. While pretending to be an unremarkable noble student, Cid secretly fights against what he believes to be a fictional cult, only to discover it's a real threat. The series blends isekai, chuunibyou, comedy, and action, depicting Cid's journey to becoming a true 'eminence in shadow' amidst misunderstandings and reality. It has been adapted into manga, anime, and games, gaining widespread popularity.