Assassin (刺客, Shikaku) is the 39th chapter of the Kiseijuu manga series, written and illustrated by Hitoshi Iwaaki.
Shinichi's resolve to kill all the Parasites becomes stronger than ever, where he's even finding joy in the prospect of it. Migi then senses that three parasites, with bloodlust, are coming after them. With Migi asleep, Shinichi must evade the parasites for an hour, which he successfully does. Though when only one person confronts Shinichi, it's revealed that Miki has three parasites in his body.