Youngest Son of the NamGung Clan

This is the story of NamGung DeSo the youngest son of the NamGung Clan
After losing his dantian in the competition for the position of vicepatriarch he then faces an unexpected death out of nowhere and regresses into the past
The youngest son of the strongest clan
Such a title is way too bothersome
Let someone else become the strongest person or whatever
Can the former trash of the clan make the most out of his second chance at life