Ibeon Saengeun Naega Juinimnida

Helena Croisen, bastard child of the family, thought she would finally be acknowledged when the power of the guardian stone manifested in her. Little did she know, a conspiracy was going on behind her back — one that would end with her beloved fiancé stabbing her in the heart. As Helena draws her final breath, a mysterious voice speaks to her. “Do you wish for vengeance?” Next thing she knows, she’s gone back two years in time! Will Helena be able to avoid the same tragic fate this time around?
(Source: Tapas)