Her older sister, Yuuka, gives off the air of a nice woman from the moment she sees her. Yuuka said that she liked the way I looked, and as soon as she took her eyes off me, she started seducing me. She stares at me with wide eyes and pushes her long tongue inside me, letting her saliva pour into my body. Yuuka's tongue, which is filled with her moisture, is like a living thing, entwining with her, dragging her in, swallowing her body and soul. The longer she doesn't find out, the more radical her immoral tongue kisses will become, and she won't be able to stop him from draining her of her bones...