Diggory Is A Loser

Celia Diggory is the younger sister of Cedric Diggory. While her older brother is the most popular boy in the school, Celia has no friends and her goal is to go through life unoticed.
She succeeds in this goal until her 5th year, when Cedric is chosen as a Triwizard champion, throwing her family into the spotlight.

Everyone begins to tease her as they wonder how a popular Hufflepuff like Cedric, could have such a weird bookworm Ravenclaw for a sister. And her life continues to get worse when her roommate Cho Chang starts dating her brother.

Celia wishes that her life would just go back to normal, and that her brother would just disappear. But when half of her wish is granted, she realises that her life will never be the same again.