Chinless Gen and I Are Parasites (アゴなしゲンとオレは寄生獣) is the 12th and final short story in the manga anthology Neo Parasyte M, written and illustrated by Akira Hiramoto. It is a crossover between Parasyte and Agonashi Gen to Ore Monogatari (The Story of Chinless Gen and Me).
Mitsuyo finds two men collapsed on her doorstep. It turns out they had witnessed parasites eating and were forced to flee, and she takes them in. However, they quickly overstay their welcome.