So, I watched this series after completing Reply 1988, which I loved by the way. I tried a couple of times to watch this one and thought it would be fun considering the boy band craze feature but it... wasn't. Once I finally could make myself complete an episode, I started to like it but then half way through the series it just became kind of boring and typical.
I was grossed out and slightly angered by the romance between the older brother and Si-Won for two reasons, 1- the age difference is gross. She's still in high school and he's a teacher & 2- how are you going to start a relationship with your dead fiances sister? And neither of them thought twice about her being a hindrance to them being together. Wtf was that about?! However, I do like that Yoon-Jae initially backed off for the brother since he gave up so much to raise him. Typically characters are selfish and go for their own satisfaction.
At first I hoped for Si-Won to end up with Yoon-Jae, but after the little teaser with Yoon-Jae and Jun-Hee, I totally changed my mind? ! I never actually thought they'd explore the gay angle and they still kept it very surface but it was enough for me to want it to happen. Jun-Hee seemed like the most mature out of everyone and it would have been nice to have seen him get who he wanted after patiently waiting in the background. It definitely seemed like Yoon-Jae was thinking about it and that would have been the best twist if they put them together.
Otherwise, character development got an F. It especially shows in Si-Won. She's still incredibly immature, in attitude and how she dresses.
Unfortunately, this installment of the Reply series isn't recommended.