After measuring, cleaning, and smelling her belly button in Part 1, Rei Aino is ready to take this fetish even further. In this second part, Rei dives deeper—literally—into the world of belly button obsession. Using a high-precision microscope, both the surface and the deepest parts of her navel are explored. The camera ventures into untouched corners, revealing textures, tiny particles, and the residues never seen before. Noticing microscopic dirt, Rei responds with curiosity. She grabs a cotton swab and starts extracting each bit to examine them closely... and then smells them. Strange, right? To her surprise, there's no bad smell. This scene is pure bliss for lovers of detail, obsessive cleanliness, and intimate exploration. With crisp close-ups and Rei’s sincere reactions, this part feels just as scientific as it does erotic. A freshly cleaned navel marks the end of this second part—but sets the stage for something even more intense. (220915_03_02)