Both are action,comedy genre (at the most serious moments/scenes it can make you smile.
Both male leads are after justice and can’t stand injustice ,their facial expressions are so good and are so funny to me.
Just like in The Fiery priest Kim namgil’s character is way different from the priests we’ve seen before ,in Bad prosecutor Do Kyungsoo’s character is different from the prosecutors we’ve seen before

Both school dramas
Both double characters
School bullying
Love triangle!?
School changes
Friendships
Idol actors