Read Nisekoi manga
On May 9th, 1999, Raku Ichijou was born into the Yakuza heir. On June 7th, 1999, Chitoge Kirisaki was born into the Bee Hive Gangsters. Even though Raku may be the next heir to a Yakuza group, he’s actually a normal highschool student who wishes for peace and quiet. However, when he meets violent transfer student Chitoge Kirisaki, his life takes a sharp turn for the worse!