恋愛グリモワール ～最強童貞の勇者様が結婚しないと世界は滅亡するそうです～

Love Grimoire - It Seems That the World Will Be Destroyed Unless the Strongest Virgin Hero Gets Married, Love Grimoire ~The World Is Doomed Unless the Ultimate Virgin Hero Gets Married~, 恋愛グリモワール ～最強童貞の勇者様が結婚しないと世界は滅亡するそうです～, Love Grimoire: Saikyou Doutei No Yuusha-sama Ga Kekkon Shinai To Sekai Wa Metsubou Surusou Desu (manga)

勇者はついに魔王を倒し、魔王を封印した。The hero had finally defeated the demon lord, sealing him. However, the seal he had used was only temporary. Should evil rise again, the descendants of the hero shall follow in his steps. At least... That was the plan. Its too bad that the hero is still a virgin! If he doesn have children by 30, hell become a wizard! And so, the hero desperately begins his journey to find a wife...