While the idea is interesting and the characters are well-written, the entire work seems rushed in a way. When a work is about time and space, one would expect a lengthy or at least an enough explanation to what is happening. Instead, we were confused the entire time, not knowing what is happening but are reading regardless because the work is still enjoyable. Characters were not given time to think about what was happening. In fact, it seemed that they were a know-it-all, always figuring a really complicated thing in a very short time with the weirdest of methods. I was pretty disappointed by theending, it was rushed which was something everyone could easily tell. Regardless, I still think it is worth it to read this webtoon.