I would love if they ended up dating, fell in love and then on the day that they have sex for the ritual, it is actually a ritual used to sacrafice the boys soul that her family didn't tell her about. It'd be pretty fucked and sad, but would make it non cliche and unique
That moment where certain things are viewed differently at a huge level. Pretty sure that girl doesn't even realize the effect of what she's asking is. Past the magic stuff anyways.