The Northern Duke Who Eats the Warrior Party

I was reincarnated as the older brother of a warrior whose death was scheduled. I wanted to live my second life comfortably, so I rolled around here and there and ended up becoming the Duke of the North. As in the novel, the Demon King was defeated. As I was living leisurely, the warrior came to me and said. "Hyung, have sex with my party members and make children for me!" ... Let's start by breaking the head of that NTR-type little brother.