The village houses a system of tunnels underneath, where its deepest point is home to the "Hellish Abyss", a deep hole that collects the souls of the dead. To keep the Abyss from unleashing the dead, a pair of twins born in the village are required to perform a ritual approximately every decade, in which the elder twin strangles the younger, after which the soul of the younger twin stays to guard the village as a crimson butterfly while the older stays in the living world as the remaining.
The village features an underground network, with its lowest point housing the 'Hellish Abyss', a profound pit that gathers the spirits of the deceased. To prevent the Abyss from releasing the dead, a pair of twins born in the village are obligated to perform a ritual every decade, where the elder twin suffocates the younger, after which the soul of the younger twin remains to safeguard the village as a scarlet butterfly while the older stays in the living world.