Dai Nana Ouji ni Umareta Kedo, Nani Surya Ii no?

In rare instances, children retain memories from past lives after reincarnation, a fate determined by divine will. One such individual is a prince from a kingdom where each of his older brothers has a distinct role—first in line for the throne, second as a diplomat, third married to a foreign princess, and the fourth and fifth excelling in music and art. The youngest of these siblings finds himself questioning his place in this arrangement.