Echo's sister, Zo ë, died strangely a year ago. Aike, who was attached to her sister from an early age, has not been able to recover from the pain. In the face of a highly antidepressant mother and a father who was frantically busy with work, Aike forced himself to be strong and independent in high school. Although the killer has long been caught, Echo has always linked his sister's ex-boyfriend Mark to her accidental death. Accidentally, echo found his sister's diary in Mark's new car, and the mysteries seemed to be solved gradually. And does the real cause of death of my sister have anything to do with Mark? The lies hidden among high school students and the unknown secrets in the girl's diary, when all is revealed, is there still a dark conspiracy behind the truth of this murder?
5.3
