Twin Princesses of Wonder Planet Gyu!

Twin Princesses of Wonder Planet Gyu! is the sequel to Twin Princesses of Wonder Planet.

Plot
Fine and Rein, along with other princesses and princes, leave Wonder Planet to attend the Royal Wonder Academy of Education. This prestigious institution is the school where Princes and Princesses from all of the planets come to receive their certification to become Kings and Queens. Upon arrival at the school, Fine and Rein's unprincess-like actions cause them to violate school regulations and lose points. During the orientation of first year students, the vice-principal presents a legendary bell that will only ring when a certain person touches it. If the bell rings, the person is classified to be the "Universal Princess". No princess had ever rung the bell before. But Fine and Rein rang it, and they transformed.

Strange situations have also been occurring in school. A dark entity comes out and forces everyone to become depressed. When someone resists, the dark entity sends monsters that cause extensive damage. One of the first people to become possessed under this entity was Toma, the new president of the student advisory.