Female department head "Reiko," working as a career woman, invites her subordinate "Mako" to her home. Unaware of Mako's special feelings toward her, the two spend the night together. As a result, Mako confesses her love to Reiko, and their superior-subordinate relationship evolves into a forbidden affair. Deeply adoring each other's bodies, they come to cherish every part—including urine and anus. Connected by a double-headed anal dildo and confirming the depth of their love through mutual urine drinking, the two women surrender completely to their passion.