System

System summary:

She was only 37 years old women who are successful by her own means. Died because of the ma.s.s shooting that is currently popular in the country she is in, Transmigrated into a 16 years old teenager. Oh, did I mentions that the teenager is a male? Not only she is confused about her own gender, now she is confused on how the new world around her. And why is her younger sister is so cute...