[Genei Soda (Hiiragi Popura, Fantasma_cola)] Kuchi Utsushi no Sandatsusya [Full Color]

A curious blonde maid discovers a gelatinous blue entity while cleaning the palace, only to find herself consumed and reborn as a voluptuous, silver-haired temptress with a glowing mark on her chest. As the parasitic being hops from girl to girl, transforming each into its ideal busty host, the proud new vessel sets her sights on seducing the palace's two princesses. Possession, transformation, and forbidden lesbian desire collide in a tale where the "passenger" seeks the perfect host through lip-to-lip transfer.