Jax is Zaki's ex-boyfriend, he broke up with him because his too much obsessed with him.

Zaki had been together with him since senior high to college.

Zaki thought that he'll just move on about him but when he saw him with his best friend alone at a party, he started asking questions about his relationship with his best friend.

Since then, he keeps stalking Zaki everywhere he go and even calls him everyday, it was no use blocking his number because he has many numbers.