Zombie's Dick Is A Bibibic summary:

In a world where everyone has turned into zombies, office worker Park Heeun is trapped in a situation where he faces either starvation or a brutal zombie ending. He decides to ignite the last spark with his rival, Jin-woo, who is gradually turning into a zombie. However, it turns out that the handsome rival zombie's di** resembles a Bibibik (korean popsicle) ....