Undertow (2015)

LANA, a woman in her late 30s who teaches Dutch language at a secondary school, is at her wit's end about how to handle her new 17-year-old student Benny, an aggressive yet also very cold-blooded alpha male. Benny's intimidating behaviour has a paralysing effect on Lana's ability to function, and she does everything she can to escape Benny's dark attraction.