this or that (drama tropes edition)

Detective 

ML is a crown prince or king

a birth secret which will suddenly propel an outside main character into the wealthy family

Historical where FL is a commoner  chef or a noble princess

lot of contact with her ex

main character with mommy issues or daddy issues 

half sibling!

drama that follows the life of idols or athletes

princess

main characters are high schoolers or in their 30s