In the shadows of their devout home, sisters Aimi and Yumi find themselves ensnared in their own desires. Aimi, the elder, suggests a game of hide and seek, but Yumi knows it's a ploy to sneak a peek at her body. They hide together in a cramped closet, their hearts pounding. Aimi's hand grazes Yumi's thigh, and she gasps, feeling her sister's innocent touch ignite a fire within. Their breaths grow heavy, and they can't resist exploring each other's untouched flesh, their virtue crumbling as they succumb to their taboo lust.