Manga Tensei Kizoku No Isekai Boukenroku ~Jichou Wo Shiranai Kamigami No Shito~

The story follows Shiina Kazuya, who tragically died at the hands of a stranger while protecting his younger sister and childhood friend. But the fun begins when his soul finds a new embodiment in a powerful being who belongs to the upper class and community.
He spends all his childhood with divine society, noble girls and nobles. Since childhood, he enjoyed the powerful patronage of the gods, which allowed him to easily cope with any problems and obstacles on the way. However, he never spoke of his importance or status. The story will show his inner experiences and tell that even powerful beings can behave like little boys.