ロイヤルベルを鳴らして

The setting is a poverty-stricken country known as Vinbona.

Although the heroine, princess Yuuri, has only steamed potatoes to eat as her meals, she's happy with her life, and everything is peaceful.

One day, a prince named Alt from the rich kingdom of Kanemotia appears, and Yuuri attends his birthday party instead of her father's. However, that ended up being a big mistake, as she doesn't want to return home.

To help try and bring Yuuri out of her sudden sadness, the king of Vinbona comes up with an outrageous plan--