"A gang of vampire guys...who can grow samurai swords from their very flesh! And to add to it, these vampire yakuza guys might not even be aliens! This isn't a mission. These guys seem to know who is working for Gantz, and are coming after them. On the streets where they work and live. In the daylight. All of a sudden the wall between everyday humanity and Gantz's nighttime, extradimensional hunts is crumbling. What will Kei and the others do? Can they regenerate when they're injured outside of a mission?"--Publisher's web site.