Manga by author Nakamura Takatoshi - Status ongoing

The story takes place in a world after the legendary warrior defeats the demon lord. After he brought the peace to the world, he decides to set another adventure to search for his wife.

From FairGame (Jcafe24):Andou Sora felt his limit to his talent, and quit the soccer after middle school graduation. However, encounter with representative of Japan's national womans team. Wakamiya Shiki, she moved something that slept in deep inside of Sora's heart.