The Regressed Youngest Son of the Duke is an Assassin

Sian Verte, the continent's greatest assassin. After being betrayed by his older brother he trusted his entire life, he meets a miserable end. 'If I was given one more life, I will live it differently.' A life where I would serve no one but myself, where I could accomplish everything on my own. That's how my second life came to be. No longer will the shadow Sian Verte, who lived for others, exist anymore. This life I'm rewriting, I will accomplish everything for myself!