There are a few scenes that take place between the end of their high school days and the start of their college days that are complete gold, and that's the only reason I'm giving this a 6.5
The first half was fine, the 3 episodes referenced above were FANTASTIC, and then it was pretty bad starting episode 12 forward. That's a lot of bad episodes.
The ML and FL did a great job, and I honestly would've dropped it if it hadn't been for the actors. But the rest of the cast was not great. Another super irritating thing about this drama was how the friends were so stupid. I mean, everyone but the mains were morons and didn't know how to listen, especially the lazy guy friend from high school and the FL's best friend. Ugh. They were SO ANNOYING! I skipped so much of episodes 20-28 because of these two characters.

Chemistry between the leads was great, romance was good, support cast and story were extremely *meh* 6.5 is generous.