Killed then reborn in a new world, the usual. But in this anime they don't explain anything. The main character as per usual is overpowered but they don't explain why he is so strong or how anything in this world works. He is pretending to not be the main character for no reason really. Not to mention the relationships between people are very weird. Like you could tell the anime isn't that well thought of but ya know it's okay to watch. 7,9 rating made me think that it will be close to other anime's with a high rating but not really. To be in full honesty this anime's real rating is 6,5 so don't get your hopes up.