Just some ty ideas for stories 

The supposedly delinquent daughter of a gangster. The daughter who never got acknowledged despite her performance in school. The japanese delinquents who keeps on breaking rules.

After causing trouble at the field, baseball player Ahn Yujin got ejected out of the game and left the stadium.  After that incident, Yujin got demoted to the second string and will not return to the first string until she improves not only in her sports field but also in her academic field.   After suffering a horrible trauma d

Living her life as a weapon, She never got to taste the life of being a normal student. She lived her life staining her hands preying on people.