After My Rebirth, I Ruined My Life and My Roommate, the Immortal, Came to Rely on Me.

A reborn person who holds a map of the economic trends for the next twenty years and just wants the world to be at peace. In order to protect his childhood sweetheart, the national angel, he has to lurk in the entertainment industry as an "idle assistant". However, he uses the coordinating wisdom of an old project manager to find a balance between investing in a future boss and a Buddhist life, and ultimately leads a "slow down" life philosophy.