Momona is a girl in Jewel Land who is longing to see her older cousin getting married. However during the reception, she is transported to the prestigious Jewel Palace alongside other girls. She then meets Ruby for the first time, receiving a pen-like item. As Ruby tells her to become a Petit Lady so she can be crowned a Lady Jewel, Momona has some tough decisions if she can do it.
Momona finally decides to stay in Jewel Land and become a Petit Lady with Ruby. However she faces a serious problem, involving the kiss between her and Cayenne and the other candidates are as more lady-like as her. To make things worse, her next test is to pass the "Nice Dining" exam with him in order to advance.
As the day of the test draws near, Luea is saddened about how her previous partner left her years ago while Ruby still worries about her partnership with Momona; keeping her secret and lie about being her mentor. Miura and Luea then talked about eradicating Momona and Ruby out of the competition; him doubting on what she said while Lillian overheard their discussion..
For the next test, the ladies must learn to prepare things and to pack things necessary for travels. Thought before the exams, Momona and Charon then pay a visit to the Prince Palace to return Levin's Jewel Pad. In there, Momona encountered Miura and he told her to be herself...regarding the secret of her enrollment to the Jewel Palace..
The next exams given is to prepare a picnic lunch that can make someone smile. With that said, Momona herself posed a problem to the challenge as she is very inexperienced at cooking.
Due to their scores, Momona and Lillian were both to be transferred to the Royal Palace soon. But Ruby is more of worried than happy for her due that she didn't chose her as a proper Petit Lady and is been lying to her ever since. In all her worries, a strange Jewelpet, who being the one who told Momona to be her mentor finally makes her appearance...
The Petit Ladies this time must participate for the challenge given to the Prince Candidates, which is home cooking. When the the food they will cook ends up to be Curry, they all must see how do they perform in terms of cooking skills...
The staff of the Jewel Palace will host a Thanks Jewel Palace event with the theme being a Samba Carnival. With the event being organized by Ruby, Luea plans to spoil the event for the Petit Ladies and on her sheer hate against her...
The next exams for the Petit Ladies is to experience how to take the dogs on a stroll in a presentable manner. It is also decided that the ladies must work with the princes in order to pass the test. But when the Jewelpet featured in the test is Nephrite, things doesn't seem to go as planned for Momona when she found out he is more of a trouble to work on..
Halloween is just around the corner. With the next exam featuring Masquarade, the Jewel Palace is hosting their annual Halloween Party for the Petit Ladies and the Prince Candidates alike. However, strange incidents starts to occur during the event, which puzzles Momona and the others..
The challenge this time is for the princes, which is gathering mushrooms in the Jewel Mountains to make delicious Mushroom Hotpot. Since the Ladies needs to evaluate the Princes this time, Momona starts to notice Miura becoming anxious for unknown reasons..