The main reason I'm writing this review is bcoz of tge too much negative criticism and objections I'm seeing towards it. So I just hope my review will be helpful make the ppl who haven't given the drama a chance, give one.

Storyline/concept :
I'm someone who loves science but hate maths bcoz of childhood phobia. But still I loved how much meaningfully they created the storyline, incorporating it with beautiful mathematical concepts. It nade me even google about them to know more. The storyline mainly focused on how a comprised education system and taking shortcuts could ultimately ruin the future of the student. The storyline was smooth yet engaging where the lead characters tried to expose the corrupt school education system. Never did I feel bored while watching a single episode of the drama and infact felt how did they make such a beautiful story with a blend of love, maths, and life.

Acting :

Lee Do-Hyun, this guy deserves a separate award for picking scripts and characters which has lot of scope. This is his 4th drama I have been watching, just like the the other three, his acting was so good that I felt this character Baek Seung Yoo made for him.

Im Soo Jung, her acting is as beautiful and emotional as how much her looks convey to me everyime I see her. I loved her in Chicago typewriter, and this one Ji Yoon-soo gave it her best.

Jin Kyung as Noh Jung-Ah, is just wow with her exceptional acting especially in the ending eps. I bave been a fan of her since I saw her in as head nurse in Dr. Romantic, now this one is totally different and she just nailed it.

The supporting actors especially the kids did a great job.

Characters :
Baek Seung-yoo, love like Baek Seung-yoo no matter what you love. I think words will never be enough with how much impressed I was towards his character. He was calm and composed, and wasnt reckless, he did start loving his teacher Ji Yoon-soo, even when he was unsure, I dont feel thats wrong bcoz he never behaved as someone who has been infatuated, I just felt it was pure love and admiration towards her who help in rekindling his love and interest towards Maths. I just felt he loved both her and maths in same way.

Ji Yoon-soo , my heart broke her, when she was framed in an illicit relationship with Baek Seung-yoo, whereas all I have seen was an enthusiastic teacher who only cared about bringing the best of her student who loved Maths and is talented. I also admired how despite being cornered, and accused she stood for herself. I also loved how with growing years, she too started loving him back.

Relationship between leads ;
Now here is a big question? Student-teacher - Relationship, a big no no for me. For real basically there was no mutual relationship between two when he was a student and underaged. He started loving her unknowingly, but thats human heart, and it isnt crime and never was he reckeless or it seemed like how ppl are actually defaming it. All I see was love between two humans , which has grown up with years , turned into more matured, withstanding the ordeals, the judging society , standing high and chasing their own set of individual dreams. I just feel ppl are just pushing away the beauty and emotional quotient shown in the relationship just bcoz it involved a student and teacher.

OST :
I wouldn't say the OSTs are great but they are soothing and the OST 'Darling' is something I'm in love with.

Overall review :
A good engaging watch, which I thoroughly loved from first to last. It is much more than relationship between the leads relationship which wasnt shown in any absurd romantic way but instead shown beautifully underlying with a story and message that delivers meaningful drama overall.