First things first, be warned that if you are looking for a light,fluffy watch this drama is really not for you.The reason i gave it a 9.5 though it's not particularly stellar in any aspect is simple.I keep going back to it again and again,which means it captured my heart. I had read a review which said the story is not about like/dislike but about watching it at the right time. I totally agree with that. A lot of the story is based on their campus life.I'll list all the things i loved about this show ,which made me watch it 4 times already and i'll probably keep watching it again and again.
THINGS I LOVED:
1) The female lead is absolutely amazing. Her love is deep, pure ,selfless,persevering(come on she loved the guy for years) and yet she is not a blind love struck fool whose self respect and life takes a backseat to her love for the male lead. She is more often than not sorted, has her own opinions on everything and a tons of self respect.It's honestly very refreshing.

2)The writers definitely were not joking around when the named the show.Throughout the show you see various side plots all revolving around the same concept in different ways.

3)The side characters have their own stories and are not just there for the personal growth of the main leads or just for the plot development. As mentioned above you'll see their own unrequited love and how it affects their life.

4) I find every frame aesthetic and it somehow seems to fit right into the tone of the show. Same with the music .

5)The leads are not perfect yet they're close to reality . The male lead is one of those popular guys. But he's not a cold snobby jerk. At the same time he's not perfect either.That just makes him more appealing.

6)Overall the whole thing just tugs at your heartstrings and leaves you with a nostalgic feel when you finish it.

SOME CONS:
1)There comes a time in the show where the male lead's life turns upside down. I kinda felt like there wasn't a need for the extreme hardships that were thrown his way even considering that hardships are necessary for growth. It just didn't seem to fit with the plot.

2) His ex man. She is the typical conniving ex-girlfriend and for a show that's not really typical it's kinda annoying yet in a way necessary for the main leads relationship.

3)Her love for the male lead, It's admirable,selfless and awe inspiring . But why on the world didn't she simply move on.That is something i didn't really get. But i'm not really complaining as the plot builds around that.

I'm sure there are probably more things i didn't cover or forgot to mention.
LONG STORY SHORT .
IF YOU ARE IN THE MOOD FOR A SERIOUS SHOW WITH CHARACTERS AND SCENES THAT DO NOT MAKE YOU CRINGE, GO FOR IT.(seriously guys. there's almost no cringe content)
YOU WON'T REGRET IT.