Listening to its opening songs was what made me watch this show, albeit much later than everyone else. However, in addition to this show's amazing soundtracks, the story itself is very compelling. A man who, despite having lost so many things dear, refuses to give in to hopelessness and continues to reach for his goal no matter the cost. At times, the show becomes very similar to the plot of others such as Re: Zero, another time travel series, it contains its own charms that sets itself apart.
Combining characteristics from classical works such as Dr. Who, it conveys feelings and messages through its viewers in a way that very little series managed to do.
If you desire protagonists who will strive to the end, despite losing everything in the process, to achieve their goal, I highly recommend this series.