Synopsis
The series centers on twin princesses named Berry and Flora, born after their mother passed away during childbirth. As they mature, their father selects Berry to inherit the role of Onaka Hime—the Stomach Princess—a position that grants its holder the ability to cure sickness among the kingdom's people and enhance the beauty of its women by making use of BifiX 1000. Feeling let down by the decision, Flora nonetheless keeps pursuing her studies. When it appears that Berry cannot yet harness the power of BifiX 1000 to cure a woman suffering from illness, Flora takes the product for herself in an attempt to cure the patient on her own. Once Berry learns what her sister is doing, she retrieves the product from Flora before she gets the opportunity to put it to use.