My Sister's Serial Killer Boyfriend

In this gripping thriller, a local reporter investigates a series of murders targeting women who share a striking resemblance, while her younger sister starts dating their self-defense instructor. As the relationship deepens, the reporter becomes increasingly suspicious of the enigmatic instructor and must intervene before it's too late. Will she be able to protect her sister from a potentially deadly obsession?

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Some movies that have similar genres and were produced around the same time as My Sister's Serial Killer Boyfriend include Holland, Cellar Door, Fall, The Royal Hotel, Last Survivors, Baby Girl.