there are slight spoilers here not the big ones..
THE CHEMISTRY!!!!!!!!!
They are so cuteeee. Their relationship was so healthy and they never broke up. This is all I like.
We saw them from being in the freshman year to being successful and they never left each other.
The friendship between all of the friends is like a dream for me. Leads had jealous people by their side but they had more good people who will support them till death.
This was so satisfying to watch as female lead was always so strong and she always had a clear mind about her aims. I love her!!! Such a kind yet strong lead.

Male lead is so smart and always sees the future in a good light. I love his personality. He achieved so many things in a young age.
I like how even the side characters who were in relationship never broke up but solved their own problems together.

There's no bad people here all of them got a character development.

Overall this drama easily entered in my top 5 cdramas.