The first episode is good enough to keep me interested.

There's nothing much to see in episode 1, but it's enough to tell you what you need to know and to make you anticipate the next episodes. They already introduced a lot of characters and it gives some hints on their past. It took me a few days to finally give this drama a try because I thought it would bore the hell out of me, but thankfully, it didn't. The cinematography and effects are also good. Judging from the last few minutes, it seems like a huge portion of this drama would focus on their high school days as it unravels the history of the characters and their relationships.