Age of Youth would bring you an enormous nostalgia if you happened to stay in a dormitory/apartment with people who were first stranger to you (or even when you are currently living together with roommates with different stories and personalities.)
The drama has 12 episodes (one hour each). One might think it would not be possible to fit in five stories in twelve episodes, but watch it first before doubting. I found it amazing as to how the team was able show everyone's stories without shaking off the scenes' transitions. And that the story's direction was clear enough to be followed by the audience.
Age of Youth was able to depict the realness and pureness of a person. Everyone has their own struggles in life. They have their own ways to overcome those. Others may need someone to lean on, someone whom they can easily share their thoughts with, someone who would understand them. While on the other hand, there are those who would rather keep everything to themselves and try to solve it on their own for they have built a wall separating them from the outside world. It may seem pathetic and frustrating but baby, it happens and there are people living this way.
Throughout this whole process, the five leads were able to slowly open themselves up to each others and from being mere strangers, they have grown to appreciate one another that eventually leading to them treating them as sisters.
It was a story of what life is when you are young. You feel lost. You feel like you are not enough and the world does not deserve you so you better perish as you think you are doing a favor for everyone's sake. But no, youth is when you gain experiences that would be your foundation for the next decades of your life. Here's to when you would gain and lose friends. You would would experience love and heartbreak. Youth is nothing but a series of events which requires you to surpass in order to live your life to its extent. Youth is where you must enjoy your life the most.