Sugar Sugar Rune Volume One is a manga by Moyoco Anno, and it was published by Del Rey in 2005. The series is rated “Y Ages 10+”; after reading the first volume of this series, I would agree with this rating.
The main characters of Sugar Sugar Rune are a couple of 10-year-old witches named Chocolat Meilleure and Vanilla Mieux; they are best friends who are competing to become Queen of the Magic World. The girls are sent to the Human World, where the winner will be determined by which one can attract the most human boys. When a boy falls for a witch girl, she utters a spell and takes the boy’s heart in a jewel-like form. However, the color of the jewel is determined by what emotion the boy is feeling when the heart is taken, and the color of the jewel determines how much it is worth in terms of the currency used in the Magic World. Luckily, humans have more than one heart that the witches can turn into jewels, so this practice will not kill a human.
The competition is awkward enough due to the fact that Chocolat and Vanilla are friends, but it turns out that Vanilla’s mother (the current Queen of the Magic World) and Chocolat’s mother competed against each other for the title. The two girls are also as different as night and day: Vanilla is sweet and shy, while Chocolat is loud and obnoxious.
A very important rule in the Magic World is that a witch cannot fall in love with a human. If a witch falls in love with a human and her heart turns ruby red, she must offer her heart. Unfortunately, since witches only have one heart, a witch will die if she has to offer her heart. During this volume, Chocolat finds herself starting to fall for an aloof older boy named Pierre, and this attraction begins to distract her from the competition.