Grafitti's Yozora and Kozue, two alluring women bound by blood and sin, find themselves entwined in a web of lust and desire. In this visual novel, they explore their forbidden attraction, their bodies entwined in a dance of taboo. Yozora, the elder, guides Kozue, her younger sister, through the intricacies of their shared passion, their skin adorned with ink that tells a story of their own. As they succumb to their desires, they find solace in each other's arms, their love a secret etched into their skin.