[Introduction]Nisekoi

Nisekoi follows the main characters Raku Ichijō and Chitoge Kirisaki whose fathers are leaders of the yakuza and the Gangsters respectively. The two of them meet one day after Chitoge Kirisaki jumps over a wall on the way to their school, tackling Raku Ichijō in the process. After she runs off, he gathers himself back together and realizes that his locket he been given by his childhood friend and lover had vanished. The promise that went with this locket said that once they meet again, she would unlock the locket and they would marry as soon as possible. As it was still important to him, when he found out that Kirisaki was in his class, he forced her to help him look for it as an apology for tackling him. They begin to hate each other and want the searching for Ichijō's locket to be done with, but alas, this was to be the least of their problems.

Maganda to promise, modern Romeo & Juliet haha