Hikensha Shia
One day, Shia's happy family life of four with her, her parents, and her younger brother, was suddenly turned into hell. Shia was transformed into a monster along with her brother in terrible experiments. Now she throws her entire body into the battle for revenge.
(Source: Shonen Jump Plus, translated)
Note: Second-Prize winner in the 2021 Jump+ Rensai Audition contest.