Hey /a/, here to test your 90's anime knowledge. I remember watching this anime where people get infected by these parasitic eye-looking creatures and turning into bad guys.
The protagonist just goes about defeating the bad guys and eating these parasites as snacks in the end. Does this ring a bell?
Picture very much unrelated.
OVA? movie? series?
I thought Zenki was about a kid and a chick with a bracelet
But yes, from your description I'd say it's Zenki.
The kid is just Zenki's sealed form.
Zenki is one series that NEEDED doujins.