Although Takahiko Tomikura is happily married to his beautiful wife Manami, he still can’t shake the memories of his hometown, its lewd customs, and the dark seed they planted within him. When he finally returns to the village after many years away, he has no idea of the level of the debauchery that lies in store for him and his wife…

Behind its calm country facade, the village of Shironawa hides a dark secret. Each summer, the whole village takes part in Kagachi-sama’s Pleasures, a special sexual ritual dedicated to the local god. As an outsider, Manami is soon educated in the local customs, and quickly becomes an active participant in the festivities.

Meanwhile, Takahiko is reunited with his first love, Ayaka. It was the trauma of witnessing his crush participating in the Pleasures that caused him to leave the village, and the memories have haunted him ever since. Now is his chance to regain what was taken from him and assert his dominance within the Tomikura family.

Will Takahiko choose to watch his lovely wife’s fall from grace? Or will he seek out the comfort of an older woman? As the darkness within Takahiko grows, the village sinks ever deeper into depravity.

Cult of the Serpent is a tale of corruption that asks one simple question. Which brings the greatest pleasure: to cuck, or be cucked?