Yaoi manga

Minna-san,
I'm looking for a manga with a genre deliquent, students, gang members.
The story so far, they're from different schools and their gangs are rival. One day, when 1 frequents at the river bank to feed the cat, he met a guy (from the rival gang) feeding the stray cat. After that, they will meet at the riverside, but they don't know yet that they're from each other's gang member's enemy.

Help me, onegaishimasu!