It Takes Two To Kill You

It is true that the world is full of wonder but little did people know, even their heaven world have underworld. Organizations are fighting who will rule their world. The government, assassin, secret agents and the mafias are on the move. Two other organizations become allies that made the other two choose the most crucial decision. Two highschool students are great movers in the underworld but people around then doesn't know. A highschool popular guy who loves everyone's attention yet the coldest mafia in the underworld and a girl who's nerd and always on her book yet she's an assassin who have the greatest skills and intelligence at her young age. She's also the most beautiful that made the other organizations hate them. In their school, they never get along but they never know their secret identities. The mafia bullied the nerd and the nerd always ignore the mafia. And even on the underworld, they are rivals. One hated the other. Then an incident come where they need to reveal their selves and make a decision they both hated. To married each other or to die together?