Strangling in jeans

Two horny college girls heard about an erotic choking trend on social media. They're excited to try it out on each other. After a pleasantry, one agrees to be strangled with a belt. However, the other gets too excited while strangling her friend and ends up killing her. Instead of being horrified, she gets turned on by her friend's corpse and ends up taking photos to post on social media.

This could be a two-part scene where they switch roles in the second part.