First of all, the plot can be simple if you think about it in terms of 7 different individuals being friends.

It was beautiful watching them become friends and how the friendships evolved with time. All of their stories are engaging in their own ways, and when the story cannot advance more they just let it go, like it happened with Jeha's and Hwan's backstories.

Acting is extremely on point, I am amazed by how well the 7 boys actors played their roles. Specially Jung Woojin, the boy is extremely unlucky with his acting projects, first of all this one is released in an obscure website that probably has many people not watching, and second, his Aquaman drama is in the limbo due to financial issues. I hope the future is bright for Woojin, the guy made me cry with his backstory.

What I really made me go sad it's the fact that due to the mess this drama has become with the constant reshoots, I heavily doubt we will see season 2, and I think it was calling for a season 2 badly. I know the whole time travelling plot is really complicated in the original story, but I feel we got so many loose ends towards the end, to be completely satisfied. And while I get Hwan manages to time-travel and go back to when they were all friends, and still keeps his memories, I don't know I feel it would have been interesting to watch him try to save his friends. I still don't get why he decided to kill Ceein's mom all the same.