Harry Potter accidentally killed Voldemort's son Draco Malfoy while saving the wizarding world, causing Voldemort to decide to destroy the entire wizarding world. Merlin had to choose one of the many Muggles to change history, so the fujoshi Marin was selected to come to the HP world and began the difficult journey of collecting CP. What what? Do you think the girl's setting is too Mary Sue? Please believe that as a fuguliang, sister Ma Lin is definitely a good girl!