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～

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...