Parasyte 6

Shinichi has been hiding his true nature from the world: His body has been colonized by an alien being, and now he's halfhuman, halfalien. The other alien invaders, led by the cruel and beautiful Tamura, have discovered his secret. Shinichi is a threat to their plan to destroy the human race–a threat that these ruthless creatures will no longer ignore . . .

Volume 6 of the Parasyte manga series by Hitoshi Iwaaki.