Delinquents(?)not really, leader of the other gang is a tsun tsun and likes the rival gang's leader, their gangs were created to protect the city from injustice.
You may feel your favorite manga should be gathered together into distinct categories for your own reference and, now, you can do this with a LIST. After you've created your list or lists, you can proudly recommend them to other manga fans to showcase and share your taste in manga.
Ashita wa Docchi Da!