The new student

Two teens, from two different families.
Common points ? They are both part of mafias, they have missions, which most of the times end up very bloody.
Differences ? They are enemies since the creation of their different mafias.
Link between those two ? They are madly in Love.

Is that a Romeo & Juliet story ?
Not really ...
Cause this time, they are the reason of their impossible love.