Marquees Third Son

He was reincarnated as Leo Kaeya, The third son of the Marquis and also the richest noble in the kingdom.

What will Leo do with his new life?

He did remember the modern knowledge of his past life, and what kind of person he was in his past life, however, he didn't know anything besides, relationships, families, and friends he didn't remember a thing.

What Leo will do next?

[This is a work of fiction, The characters, organizations, and names are fictional and have no real relation to any real people, it's all a coincidence]
[The image above wasn't mine, if the owner doesn't want me to use it, please let me know]