Queen Victoria Winer Ostwen seems to be the best in the world (volume 1-6)

Publisher: Kodansha
Author: Shinshiro, Kaigozaki Festival
Size: 128mm x 182mm
Number of books: 6
Language: Japanese
Category: Girl manga, manga
Latest release date: 2023-11-30

Synopsis:
Duke of Victoria Winner is given to Prince Frederick to break his engagement. Do you cry or get angry if you're an ordinary daughter?
But Victoria didn't both. "I do not allow my engagement break." Victoria says so as to look down.
Discarding engagement, assassin, insidious bullying in the shrine, wizard trap. Love comedy where Victoria faces all of them!