Story
ONA by Studio 4°C — Fall 2016, 1 episode, Finished.
Inside a majestic museum, a young warrior gets attacked by shadow beasts born from people's fear and uncertainty over what they don't know. The warrior fights against them using the energy charger on his waist, but soon the energy runs out. In this desperate situation, he finds a new, unexpected source of power.
Synopsis via AniList (English).
