Story
The story is at the same time cliché and original (do I even make sense?). It's supposed to be your typical romance drama with an unexpected and fateful encounter leading to a hate-love relationship. However it's better than this, the boys are in their 40s and cannot act innocent anymore, well not really. I dare to sum up this story as "all the forms of heterosexual love stories".
The 1st love, the unrequited love, the budding love, the spiritual love (a widower), the "scared of commitment" love, the end of love with a couple at the edge of a divorce... it's all in one drama.

Acting/cast
The strong point of this drama is definitely the 4 men, their friendship and their interaction. You fall in love with them, you hate them, you want to be in their group, you laugh with and at them. You gotta love these boys. They are hilarious and perfectly played by the different actors.
The story tries (sometimes succeed, sometimes fail) to create the same atmosphere between the women. The feminine characters are a bit blander which is a pity. Though, I absolutely loved the character of Park Min Sook.
Loved also the students, especially Dong Hyup & his friendship with Colin.

Music
Juniel & Lee JongHyun and you cannot go wrong.

Rewatch Value
It's still totally modern and worth another watch.