Saikyou no Ousama, Nidome no Jinsei wa Nani wo Suru?

最強の王様、二度目の人生は何をする?

The story follows the strongest king in history, Grey. Although he possesses unparalleled power, wealth, and fame, there is no one who stands by his side…and he trusts no one. One day, Grey suddenly meets his death and is reincarnated as a powerless infant named Arthur in a world of magic. Surrounded by a loving family and companions, Arthur starts to experience joys in this new life that he never knew in his previous one. However, during a journey, his family is attacked by bandits... Thus begins his second life, filled with love and adventure! (Source: Official site)