俺だけ入れる隠しダンジョン 〜こっそり鍛えて世界最強〜 [Ore Dake Haireru Kakushi Dungeon: Kossori Kitaete Sekai Saikyō] #1

A young adventurer crouches at the ready, twin blades drawn, while two companions — a silver-haired beauty and a spirited blonde — stand poised behind him amid the glow of golden treasure, all framed by the promise of a secret dungeon only he can enter. This light novel launch from Kōdansha, written by 瀬戸メグル and illustrated by 竹花ノート, sets the stage for a story of hidden power and world-topping ambition. The cover's warm, energetic character art makes it easy to see why this series found such an enthusiastic readership.