All traces of sanity were thrown out the window as soon as you decided to climb inside Yuriko's shoe. You headed towards the opening of the shoe, and with whatever strength you had, you jumped up to grab hold of the rim. Pulling yourself up, you fell straight into the loafer. It seems Yuriko had not yet noticed you, as you could barely even see her head, only the large fabric that is the plaited skirt she was wearing. Figuring that it might take some time for her to look, you decided to go deeper inside the shoe.
The inside of Yuriko's shoe was dark, not to mention that it smells funny. It helps that the shoes were only bought a couple of days ago, so the presences of her foot stench was barely minimal. After having a look around, you decided to head back to the opening to see if Yuriko was looking again.
Imagine your surprise when you noticed Yuriko's huge socked foot hovering above you. In an instant, all thoughts of getting Yuriko's attention were thrown out of the window. Forget about trying to notice you, it's pointless if you were dead, and crushed underneath her foot. Quickly, you rushed right back deeper into the shoe, not stopping until you hit the shoe "wall". Yuriko's socked foot stopped just a few inches away from your face, and it took a while for you to realize that you were safe, even though you were "confined" to a few inches between the shoe "wall" and Yuriko's socked foot. Even touching it did not trigger a response from Yuriko, so the only option left was to wait, with the stench from Yuriko's sock for "companion".
Meanwhile, Yuriko, after stretching her toes while you climbed inside the shoe, continued to sit there and continue with the lesson, oblivious to the tiny "passenger" inside her shoe. As for yourself, even tickling her toes had garnered no response from Yuriko. You wanted to sulk, but then you realized that your environment was starting to shake. Earthquakes were common in Japan, but this was no earthquake. Yuriko was walking ... with you still inside the shoe. Time and again, your body made contact with Yuriko's socked foot, and the stench was just unbearable. You pray that Yuriko would stop walking soon, but where was Yuriko going anyway?