What a disappointment. The drama had great potential in its beginning but sadly lost itself and its direction. The story isn't that special, and even though they could have turn it into something really great, they chose to slow things down, added useless subplots and instead of being a refreshing teen drama, it just became plain boring. The drama's 12 episodes format was such a great occasion to focus on just one story and make it excellent (the group's bond, the music they would have made together etc...) but they managed to turn this advantage into a burden. It's like the writers wanted not to leave anyone behind and decided "heck let's have a storyline for every character yayyy". Sadly, as a 12-episode drama, yes you can tell many stories but what's the point if you can't even finish them? The ending felt rushed, and to be honest, it didn't even feel like an ending because of the many questions left unanswered. The characters weren't likeable, (it's not like we had the time to actually like them) and most of them even became annoying towards the end. If they chose the path of strictly focusing on the group bonding, it would have been way easier and just way better period. The acting was somewhat believable but failed at being convincing. I won't be harsh on this since they're young and have no experience. The music, the supposed saving grace of the drama had a point of being there in the beginning but as the drama changed its direction, it felt out of place and I even skipped through some performances. Only a few of them had me hooked with, such as the Trouble Maker one, and the one Seol Chan performed on the piano during the evaluations. Monstar started off as a drama with great potential but somehow lost its way even with a 12 episodes format. The many substories, even though well-told for some, were quite rightly way too many and just pointless. A disappointment. I wouldn't recommend it.