Xiaoyue has recently gotten hooked on a game called Magic and Dragons. In a world of dragons and magic, he meets the Magic King. That's not a name, but a title. Out of respect, he calls the Magic King his teacher, but after spending some time with her, Xiaoyue gradually uncovers her secret.
"No way, Teacher! The strongest Magic King can't possibly be a girl!" (Runs away in tears.)
A rich young lady (the unreliable strongest Magic King), a childhood friend (pseudo-yandere, cutie), an ice queen (Hey, don't faint!), and all sorts of colorful characters from the guild: their fake-battle daily life begins.