Seduce a fox

Ye-hwa, having lost Jeong-in and faced humiliation from the sudden assault on her soul on the day she died, attempts suicide to flee from the monster fixated on her. However, when she regains consciousness, she finds herself transported back 10 years, encountering the monster who looks after her. Who is this being that she does not recall, and why has he caused her so much suffering in the future despite caring for her in the past? Is it possible for her to alter the past and forge a new future?