I would say perhaps have them be brought into a police station… I KNOW HOW WEIRD IT SOUNDS BUT…
Imagine, as high schoolers, and therefore juveniles they are likely to have poor control over their actions, or in the least irrationality.
When an individual accidentally cuts themselves, and hence forth bleeds onto the floor in a public place that both characters inhabit, both lunge for the blood on the ground, due to a sense of hunger and lack of control. Due to the competition of two differing people going for a single drop of blood, they end up fighting over it. It turns very violent, and as a result, they are brought into the police station for “disturbing the peace.” While sitting in the hall, both are glaring at each other.
This dialogue just seemed to interest me as an individual, it can be changed.
MaleCharacter: Where you… going for the blood? (Looks at female character)
FemaleCharacter: Where you? (Doesn’t look at male character)
MaleCharacter: Y’know… if we’re both going to jail together, we might as well-
FemaleCharacter: They separate the different genders.
They are brought into the interrogation office where the chief is discussing what happened. Neither tell him/her of the blood, and he/she remains under the impression it was simply a brawl. Neither have anything on their record, so he/she decides to let them go under the condition of community service.
Anyways, just an idea!