(spoilers)
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The fmc wants nothing to do with the mmc and makes this known repeatedly, but the mmc is so toxic and obsessed. and in the end, she shows she would rather die than be with him. so he drugs her and then rapes her.
And that is not even bringing up the psychological torture and Stockholm that is shown. also all of this is not only seen as ok in the world, but everyone thinks the fmc is in the wrong for saying no.