(Prequel) Tokyo Babylon This is the official version reissued by Viz in North America as three-in-one volumes, unflipped, titled X Chapter 18.5 is not serialised in the official series, if you do have it please help to upload if you don't mind. Apparently, that chapter was released in "All About Clamp" artbook & manga which I don't think there's a digital version for it, (I'm still searching for it) Sadly this series has been in hiatus or discontinued so ... don't say I didn't warn. ;w; Resource links: Official: https://www.viz.com/read/manga/x-3-in-1-volume-1/product/2756