You are cursed with a curse that makes you immortal. You think eternal life would be fun because you have lots of time to do lots of things until..

You accidentally meet a man who is looking at a burning building. From your instincts, somehow he looks different. Because you are curious, so you ask him

.... Shou only gives simple answers when you ask. Besides, she only thinks of you as a little kid who just passes by

"no, i'm not immortal."

.... that simple question raises thousands of questions and curiosity. Is that true? No, I don't know.. because you are a curious child, so you keep following him no matter how many times he tells you to go home