Multi-Mind Mayhem: Isekai Tensei Soudouki manga volume 1 features story by Ryousen Takami and art by Honoji.

Bard Cornelius: the son of a nobleman of Mauricia, an empire located in a parallel universe. But Bard is no ordinary boy—he’s got three souls packed into one body! Aside from his own consciousness, he’s got Oka Sanai, a miserly samurai, and Masaharu Oka, a high school otaku who loves animal ears. With his extra knowledge of military tactics and business acumen, Bard’s ready to cheat his way to the top!

Multi-Mind Mayhem: Isekai Tensei Soudouki manga volume 2 features story by Ryousen Takami and art by Honoji.

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!

Multi-Mind Mayhem: Isekai Tensei Soudouki manga volume 3 features story by Ryousen Takami and art by Honoji.

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. Bard continues to churn out invention after invention, earning him huge piles of gold and even the attention of the king. But before too long, villains lurking in the capital stealthily attempt to hinder Bard's progress! As Bard dodges one disaster after another, his rise to the top accelerates!