I watched both school 2015 and school 2017. They are really good and interesting. But I like school 2017 more than school 2015. Because school 2015 is mysterious from the beginning but the end is not good. In school 2017, I learned a lot of from it teenagers, bad school, bully, romantic love,... I wish I could have a boyfriend like Tae Woon because even he’s hot temper but he’s so sincere and faithful. He did everything to protect his girlfriend and he also respected all the relationship which he had. I highly recommend everyone watch it. It’s so awesome.