Two MMD sisters, haunted by religious guilt, find solace in each other's arms in a virtual closet. Their untouched avatars tremble as they guide each other's cocks into their virtual vaginas. The taboo act sends waves of pleasure through them as they slowly grind, their avatars' bodies responding realistically to their simulated lovemaking. Their moans echo in the confined space, mixing with the sound of their virtual bodies coming together, again and again, until they reach a shared, virtual climax.