Strawberry Vinegar

"Feed me, or I'll reap your soul!" And with those ridiculous words, my whole life was turned upside down. Sakuraba Rie, aged nine, is a cynical and grumpy girl who cares little for her fellow classmates, and does not have a single friend. That is, until a self-proclaimed demon from the deepest, darkest pits of Hell suddenly appears in Rie's kitchen and steals a tray of cookies. What will happen between these two young girls? Will friendship blossom between them, or perhaps something more? [From Steam]