Jiyuu Kimamana Seirei-hime

Olivia, the daughter of the Cypherd family, is mistreated by her stepmother and stepsisters, but she is unable to resist... Because Olivia's mind and body have been separated! Because of this, her body remains in a state of emptiness. And so she spends her days grieving, thinking of her late mother and the boy Sirius-sama, the only people who loved her when she was young. One day, while being tormented by her stepsister Anna, with no hope in sight, Olivia makes a fateful decision... A suspenseful fantasy story of love and revenge begins! (Source: Kodansha, translated)