This is my first time reviewing on this website. Honestly, I watched this drama while it was still ongoing. The drama is good, especially in the early episodes, which were quite sad. While watching, I somehow preferred the scenes with the four main characters (Ha Yi Chan, Eun Gyeol, Se Kyung, and Cheong Ah) because they're funny and cute, which made me laugh. The appearance of other characters, like Yi Chan's friends, felt boring. The plot and conflicts were also too simple and not complicated, especially for a time travel genre. For the first rank, I think it's a bit overrated compared to other dramas with more complex plots and issues.