Spoiler alert
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The “Saint” who’s supposed to fall in love with Kahir actually it’s her second life; in the novel she’s described as innocent and a saint however after the ML and her got married they had kids and she was jealous of them because they got more attention from the ML. She started to show her true personality therefore she got feared to the point where the people wanted ML to dethrone her but the ML isolated her to her death. So now that’s she’s back she wants to go through that path again but do “better” however it’s too late because the ML has taken an interest to Rosaline. ٩(๑❛ᴗ❛๑)۶
The “Saint” will try to rape the ML, gives him drugs but our FL comes on time to stop her. The FL receives a marriage proposal which later the ML finds out and tríes to cancel so he finds something on him to get him far away from the FL. Both of them have feelings for each other but don’t realize it until the ML realizes first and as for the FL she’s confused whether it’s motherly love she has for him or actual romantic feelings.

i'm sorry but the 1st chapter made me think omg even secretary kim has transmigrated into a fantasy novel!!? pretty sure it's intentional, but dang they sure r throwing all kinds of stuff into this genre now. xDD