Read all chapters in 30 minutes No Isekai as a relief, the MC of a plump structure ( I guess this is a common theme now ) is emotionally unstable to toxic levels? Due to the burdens of everything or specifically royalty, he takes out his aggression on everything. Dn the first chapter, it's indicated he gets a letter from his future self to wake up. So that's what happens, the manga is quite realistic and unforgiving. Yet that's the appeal here, a man at his lowest point is open to change is willing to change for the better. 4/5 star series