The Battle of the Heartthrobs!
Is to get the heart of the chosen girls within 1 week, all the girls are hard to get so this would be a competition, the guy who gets most girls wins!
The place is in The World God Only Knows city, all heartthrobs has full knowledge of the city so they will know the most romantic places.
They cannot use illegal drugs to make the girls fall in love with them.
They cannot use any outside forces, they can only rely on their own skills.
They cannot interfere with other heartthrob's plans.
All heartthrobs are angry at each other so they will do everything at their skills to win.