Magical☆Prince

The story takes place in a different world. Magic exists there and magic power is commonly used. Also, there is another world called the Magic World and the Magic King rules it. The main character is Yuki. Though he can't use magic, he is put in a magic school. As expected, it is hard for him to keep up with other students. One day, when he has a rest in the park, a girl, Mira, suddenly tells him, "Please take over the throne." He says yes without taking it seriously. On the next day, when he wakes up, she stands beside him. It seems the promise they made is true!! She says, "If you break a promise, you'll be erased...." He reluctantly accepts it, but he will need to find a queen....