Isekai Shihai no Skill Taker: Zero kara Hajimeru Dorei Harem

Konoe Yuuto is a prodigy of the martial arts, possessing extraordinary combat talent that sets him far above ordinary fighters. However, his life takes an unexpected turn when he is suddenly summoned to a parallel world vastly different from his own. This unfamiliar realm operates under its own distinct laws and customs, chief among them being the complete legality of slave trading. Thrust into this strange new reality, Yuuto must quickly adapt to survive in a society where such practices are not only accepted but deeply ingrained in the culture. Fortunately, he does not arrive empty-handed. Yuuto possesses a unique and overwhelmingly powerful cheat ability known as "Skill Taker." Whenever he defeats monsters in battle, this extraordinary power allows him to permanently steal their abilities and add them to his own growing arsenal. With every victory, he becomes increasingly formidable, accumulating a diverse range of stolen skills that make him nearly unstoppable in this dangerous new environment. Rather than seeking glory or embarking on a grand quest to save the world, Yuuto has a much simpler ambition. Utilizing his overwhelming strength and ever-expanding repertoire of stolen powers, he begins assembling a loyal harem of slaves. His ultimate goal is entirely self-serving yet remarkably grounded: to secure enough power and companionship to ensure a peaceful, carefree life after he eventually retires from the battlefield.