I read the manhwa, and I like some of the changes they made, even the flip at the end but the series left out some critical details that some of the character's actions did not make sense. They never explain Denis' purpose or why he kept saying the Director always abandons people, etc. I get why they did not show the moments from the other lives they lived, but even a montage could have helped explain Denis' behavior. It had a lot of potential, but ultimately it left me scratching my head. I would still recommend it as a series to watch, but if you have a lot on your list, I'd say it is not one to make a priority.