After the young men of the Long family were born to a (two-toned) wife and a (four-toned) wife, what is the reason for this seemingly weird tradition that still continues to this day? What are the sources of tradition?
The unknown truth that was lost in records due to the passage of time was gradually revealed, and along with this ridiculous reason came a dark storm.
A school where humans and demons coexist, the mysterious student council president, the entangled Angel of the West... This is a strange yet familiar world.
And all of this started from the bond between a young man who was afraid of the dark and the will-o'-the-wisp that always accompanied him...