Parasyte Reversi

The battle for survival between humanity and the parasytes continues across the world - and in the shadows of the legend of Shinichi and Migi, a new story begins to unfold. Veteran police detective Fukami is on the trail of a large number of dismemberment murders... But after meeting a witness to one of the crimes, a high-schooler named Tatsuki, Fukami is shocked by how calm he appears. The root of that unsettling feeling Fukami has turns out to be connected to Tatsuki's family... Revealing the mystery in the background of the timeless masterpiece "Parasyte" manga series!

(Source: K-Manga)