Pixie Pop: Gokkun Pucho Vol 1

About Pixie Pop: Gokkun Pucho

Mayu, is the daughter of a cafe owner, she is unlucky with love, until she meets Puchou, the magical fairy of beverages. Now, whenever Mayu drinks something, she transforms. Milk makes her grow large, water makes her invisible, and pork soup turns her into a cute little piglet. But what will help her win the man of her dreams.

Source: Anime News Network Encyclopedia