Isekai Tensei Soudouki

Balud Cornelius is the son of a noble of the Mauricia kingdom and inside him also dwell the souls of the stingy warring states commander Okasanai Sadatoshi and animal ear otaku high schooler Oka Masaharu. With these 3 souls in a single body, he can exhibit extraordinary abilities when it comes to combat or managing the domain.

(Source: /ak/ Scanslations)