I had lots of expectations going into this drama due to the good reviews it got but I was disappointed . Though the plot is well thought out, the execution of it was kind of plain and boring. There is not a single likable character except maybe the FL. It was a bit predictable. The main flaw of the series is that the two time travelers does not have any harmony and trust between them for most of the series which becomes annoying and makes you lose interest in the drama soon whereas in dramas like Signal which kind of has a similar concept to this drama , the two leads at first does have their doubts but soon into the series they believe one and other which was satisfying further pushed the plot into the focus rather than the leads insecurities . The sub characters were irritating and got on my nerve. The twist upon twist concept got boring quickly and the main leads were kind of dumb which was frustrating. The drama overall was a bit interesting but I lost interest in the middle and I had force myself to watch till the end hoping that it gets better. This is just my opinion and if it does not appease you just ignore it and move on.