Yuusha to Yobareta Nochi ni: Soshite Musou Otoko wa Kazoku wo Tsukuru

In a world where humans and demons were at war, it was a single hero, a man named Lloyd, who destroyed the Demon Lord and his army with overwhelming power. After the war, the king gave Lloyd a lordship in a remote region and sent him away. Lloyd was also asked to get rid of the dragon that lives there, which he defeated immediately upon his arrival. 　However, the beaten dragon transforms into a beautiful woman and offers to becomes Lloyd's companion. Then Sophia, a girl known as the "Witch of Mischief," escapes from an extremist group and joins him. And finally by chance he finds Alice, the daughter of the Demon Lord. This is the story of Lloyd, who was called the strongest hero but could not find his own self-worth, finding his "family".

(Source: Lanove Bunko, translated)