To avoid conflicts with her older sister, Charlotte always played the role of the plain, supportive sidekick to her brilliant sibling. However, once she enrolled in a magic academy, whispers began calling her "a selfish, hopeless failure," leaving her isolated. Outraged by the baseless rumors, she’s shocked to discover that it was her own sister, Scarlett, who started them! Now, wielding magic of legendary caliber, Charlotte finally unleashes her true abilities in this grand underdog fantasy.

Original Webtoon
https://bookwalker.jp/series/448922/