Six amateur friends gather in three pairs under the condition "100,000 yen prize if you can kiss!" when Shino Aoi crashes the scene, escalating things into a lesbian threesome. At first, the girls approach girl-on-girl kissing lightheartedly, but gradually their arousal builds. Kisses spread from mouths to armpits, nipples, and finally to their cunts—revealing an unexpected truth: kissing can be a powerful trigger for intense sexual desire. A mysterious and sensual development unfolds in this scene.