Real High School Romance (2019)

Real High School Romance and Nineteen to Twenty share thematic similarities centered around the experiences of young individuals in pivotal life stages. Both shows capture the essence of youth, growth, and the transformative journey into adulthood.

RHSR is a Korean dating show focused on the graduation trip of high school students.
It's similar since the participants are really young (20 years old), but it's a lot shorter (13-15 minutes per episode) and they spend less time together. The relationships are not as deep as in TL but it's a light fluffy dating show perfect to binge if you like this genre

"Real High School Romance: My Date Vacation" Same format, a whole new different cast and set during summertime at the beach.