I want something like: "Temperature of language: Our Nineteen" more likely to be about high school life.

Highschool

  • A-Teen - Follows group of friends in high school. 
  • Extraordinary You - It has a cool twist but it is set in a high school
  • True Beauty - Follows girl who has a glow-up through make-up , becomes popular and falls in love etc
  • Beautiful World- Covers bullying and things of the like
  • Moment at Eighteen -Boy starts with bad rep  and starts fresh at a new school
  • SKY Castle - All the drama and pressure that comes with the rich, competitiveness and  pressure of a cutthroat school environment 
  • Racket Boys - Middle school boys badminton players coming together

Varsity


Should you start watching C-dramas there are quite a few there too. (BLs also have a few as well)

Highschool

  • 18 Again
  • Class of Lies
  • Extracurricular
  • Who Are You: School 2015

University

  • Law School
  • My Roommate is a Gumiho
  • School 2017 - Frenemies to Lovers vibe, set in high school.
  • Nevertheless, - Set in art university, about toxic romance so I'd watch at your own risk. 

NonKorean drama:

  • Forever Love (China)
  • Sixteen Syndrome (Japan)
  • A Little Thing called first Love (China)
  • With You (China)
  • My Huckleberry Friends (China)
  • When We Were young (China)
  • Koe Koi (Japan)
  • Kingyo Club (Japan)