she got raped indeed and did not die because of she is not a virgin anymore she even blushed when she got touched by those guys when she hates them the most and thought about her getting touched by a male other than the boy, if i remmember the curse is connected to her being a virgin and dying at age of 20 if not mated, im guessing the other girl that did not get the collar because she has pure love for the boy not just because she want to mate with him and other girls who got the collar just want to fuck him now she got raped she didnt die and when the boy hugged the girl she didnt burst a leak and laughed that it worked that she has a way to relieve herself when the boy is not home.
idk just a theory
i love NTR not for the plot but for art can i get an Amen