It has been a hectic week for Marjorie Valora Antoinette, a noble who lives in the Kingdom of Hamtalin. First, she meets a half-demon and goes to a tour around the Magic Academy. Then, she finds out her elder sister is about to marry someone they never even met.

However, 'hectic' soon turns into 'the worst' when the whole Hamtalin gets burned down by the so-called Revolution Army. She is forced to hide in the Magic Academy, and with the help of that half-demon and some other friends she made, she promises to avenge her family. 

All in all, it's a bit surprising to find out that the soul of the archdemon Dominic rests inside her.