Nadenade Skill de Maryoku Chuunyuu!!

Fushimi Mahiro is a stoic young man whose perpetually expressionless face has made him an object of fear among his classmates. Unable to connect with those around him, he lives a quiet life feeling entirely out of place in his own world. Everything changes when he is suddenly transported to another realm by Ika, a companion who transforms into a beautiful girl upon their arrival. To his astonishment, she addresses him as "Demon Lord-sama" and immediately springs into action to fend off a group of invading adventurers threatening their new domain. Thrust into the role of a feared overlord, Mahiro must now focus on defending his newly inherited castle from relentless incursions. His primary strategy involves recruiting alluring monster girls from various races and strengthening their abilities to build a formidable line of defense. As these powerful warriors rally to his side, each searching for a place where they truly belong, Mahiro finds himself at the center of a rapidly growing harem. Far from the isolated outcast he once was, this emotionless young man begins an unexpected journey of leadership, companionship, and survival in a fantastical new world.