Shijou Saikyou no Daimaou, Murabito A ni Tensei suru

Varvatos, once the most powerful demon lord, finds life dull and decides to reincarnate, deliberately reducing his power to an average level. However, he miscalculates, as the modern world is far weaker than expected, making him unintentionally overpowered. Reborn as Ard, he quickly gains attention, with women admiring him and the royal family urging him to take the throne. Meanwhile, a former subordinate seeks his death. Despite these distractions, Ard remains focused on his singular objective.