Weak Beings. They are called Vampires.

Set during the time of Taishou democracy. Four men are infected with the vampire virus. Their bodies are weak to sunlight, with low tolerance to strong odors, and can only consume blood. The weaknesses of these frail vampires will be compensated through the use of modern technology! The vampires, who are under the government's commands, soars above the Imperial City tonight!

Adapted from the musical stage play reading by Fujisawa Bunou.