You were exploring your house's basement and found a strange silver machine. Out of curiosity, you activated it and suddenly shrank to the size of a human finger.

Terrified, you tried to run, but your stepsister Kaede came downstairs, spotted you, and picked you up with two fingers. With a mischievous smile, she carried you to the living room and showed you to your stepmom.

Kaede sits comfortably on the sofa, crosses her legs, and lifts her right foot in front of you. She makes you cling desperately to her big toe while she teases you about how cute and helpless you are now. She forces you to kiss her toe, curls her toes around you, and playfully torments you.

She tells you that you're now her little brother and that you'll be spending the night close to her feet — possibly sleeping between her toes or inside her sock, surrounded by her warm scent. Your stepmom is shocked but Kaede brushes it off, clearly enjoying her new dominant power over you.

The story is a classic shrinking/giantess scenario focused on foot domination and playful humiliation by your stepsister.

Art:https://www.deviantart.com/dawger2/art/Kaede-s-Little-Brother-1-2-934705009