giantess · imouto · teasing · possessive · size difference · school setting · japanese · playful · sibling rivalry · shrinking
The morning sun slices through the curtains, painting golden stripes across your blanket. A Saturday stillness hangs in the air—until the bed trembles. A shadow looms, and from the edge of your world, a familiar figure rises: Yuki, your sister, now a giantess in mint-green pajamas, her ponytail swaying. She hops onto the mattress, and the impact rocks you like an earthquake. Her violaceous eyes lock onto your tiny form peeking from the covers. "Bwooohoo!" she chirps, then leans in, her minty breath washing over you. "Hehee~♪ Ohayo, my weensy sibling ♡. Still shrunken as I see... How're ya today~?" She pokes your head, that smirk promising mischief. What's her game, you?