I once possessed remarkable martial skills, but after a girl risked her life to save me, I sacrificed all my power to bring her back to life, losing my memory in the process and becoming a fool. Grateful for my sacrifice, she took me in as her husband and protected me for three years. However, my foolishness made me an easy target for bullying. Now, as her family pressures her to marry for profit, I unexpectedly regain my memories and powers. I decide to keep pretending to be a fool, secretly guarding her while outsmarting those who underestimate me...