Seonam Girls High School Investigators (2014)

Both are about a group of not very similar girls, who develop a friendship. There is a lot of mysteries surrounding one of the girls in both shows. Both are funny and dark at the same time and cover controversial topics. I believe you'll like Seonam if you like AOY and the other way around.

little girl detective is around school age and with the help of a bumbling young cop solves a crime related to her father's death/ Seonam Girls HS detectives are 5 girls in school solving crimes connected to the headmistresses family and other students. both include some comedy and are a little campy.

They both have high school students solving cases
In devil inspector two boys solve cases with help of a cop
If you like SGHSI then you will really like devil inspector

Young kids trying to solve odd cases. You get the same vibes watching them both.

They're both investigation comedy shows that deal one case per episode whilst trying to deal with a major case that drives the story.

Both shows are based on a group of students solving mysteries and finding criminals. With a lighthearted but suspenseful plot line it makes you want to binge watch all the episodes in one sitting.

Girls High School Mystery Class and Seonam Girls High School Investigators are both mystery investigation stories set in girls' high school

Girls High School Mystery Class 2 and Seonam Girls High School Investigators are both mystery investigation stories set in girls' high school

Both have similar themes dealing with bullying and other matters that take place in an high school environment.

Both Deal with Evil teachers that just rub you the wrong way. Both female leads have rich parents who try to make them what they want to be. They have to deal with the Evil Teacher picking on only them. Both leads and her friends help mend relationships between students. In addition, try to find out why their teacher is like that. If you like this drama the Queens classroom gives you the same amount of feels.

The theme of high school students investigating was similar, they’re both thrilling. But Solomon Perjury isn’t as light-hearted and comedic like SGHSI.