Multi-mind Mayhem Volume 2: Isekai Tensei Soudouki

Bard Cornelius is no ordinary nobleman's son. He's got two extra souls packed into his mind: Sanai Oka, a miserly samurai, and Masaharu Oka, a high school otaku who loves animal ears. He's left his homeland and traveled to the royal capital, Cameron, to enter an academy for knights. There, he's met by a host of intriguing classmates. Pursuing both knowledge and money, Bard aims for even greater heights. His topsy-turvy academy arc has begun.