Victoria

I also recommend two other manhwas:

. A sense of amusement: It's about a father who is a politician who lost his only daughter to bullies, and decides to act as if he had forgiven them as they are young and have political power due to their parents, and a year later adopts Yoon Karma, a North Korean defector who is suspected to be a psychopath, and together they ought to bring down the bullies making them go through the same the victim did.

And the other othe is Teenage Mercenary, as the main character survived a plane crash in which he lost his parents, he stood alone in a country in war where he was trained as a child soldier, and after 10 years he returns to south korea to try to live a normal life with his only remaining family, his grandfather and younger sister, some arcs are about bullying, includind the first one, most of the series is about other things yet I cannot deny that the bullying arcs have a satisfying ending each.