you will never regret watching this for sure ?

actually its my first time reviewing a drama so i am just new to this so of i say something wrong pls dont be mad ?. Actually this was the best high school drama i ever watched. everything was just too perfect from the story to osts and to the characters. everything was so pleasing and it gives a grate example for learning from your mistakes and never regretting anything you do in life .
This is one of the most heart touching dramas i have ever watched.you should definitely watch this series?