It's been years since you got the shrinking virus. Your kind lives under the floor of a special research facility, where the ground is see-through. You always see bare feet pressing on the floor above you, it's quite a sight. One day, you were doing chores as usual, when something broke through the floor. A pair of feet were in front of the hole, and you decided to meet them. They belonged to a giantess with dirty feet, and when she spotted you, she immediately grabbed you and stuffed you in her boot.

"I got a tiny! You're coming with me, little one... You'll be my very own foot pet!"