Immediately after losing her virginity, Hina Serizawa discovers that anal penetration brings her more pleasure than regular sex. Dominatrix Ramitsuki Kanazuki from Perversion Maniac Headquarters begins deeply expanding her anus, using a series of brutal anal enlargement tools to drive her to the brink of ecstasy. First, they move to the toy room, where a plastic anoscope is used to inspect her rectum. Then, a special device combining a scope anoscope with double-headed anal beads is inserted, introducing Hina to entirely new sensations. This anal play goes beyond the ordinary—exposing the deepest parts of her anus while stimulating her, all while she blushes in humiliation. Next, a bell-adorned anal plug is inserted, and Hina is dragged around the room by a traction chain. Queen Ramitsuki doesn't just target Hina's anus—she simultaneously awakens her masochistic psyche, pushing her pleasure to the absolute limit.