Mysterious Disappearances S1 Ep 1 - Female AR & AP Transformations

Season 1 Episode 1 The Cursed Book, the Maiden, and the Birthday
Virginal 29 Year Old female store employee Sumireko Ogawa with a bosom as immense as the utter contempt it holds gravity in is cursed by a magical book to be age regressed into her child-sized body under the light of the Moon. She changes ages multiple times when she wants to stay young, while running away with the cursed book.