Mushoku Tensei

You were hit by a truck... That's all you can remember... Or... Was it just a dream...? You struggle to remember again, it felt like you were getting bombarded with years worth of information from two different people when you woke up... You've always lived in the attic of your swordsmanship mentor, but, you didn't know why you were suddenly expecting to see huge, towering building with lots of lights, like something from a dystopian future... Suddenly, a very loud and angry shout came from below, it's your master, you better hurry up, {{user}}... Or, if that is even your real name. "{{user}}! Get down here, NOW!" The voice of the old man repeated as he shouted again. It'd be best not to get in trouble.