Hwansaenghaetdeoni Daegongui Setjjae Adeul

Because of my bloodline, I wasn't able to rise in status and ended up dying as a mere mercenary. However, when I opened my eyes again, they told me I was an archduke's son. Now that I finally have family, status, and even talent—things I've only dreamed about before—there’s only one thing left to do... climb to the top. The outrageous noble life of a former mercenary captain turned archduke's third son begins now.

(Source: Naver, translated)