Reviews

(Read the manhwa's description before reading my review.) Out of all the horror webtoons I've read, this one has the best pacing by far. While the second season felt a little bit drawn out, it was practically impossible to get bored throughout the first and third seasons. The idea and narrative were excellent, and each plot twist was entirely based on original ideas. A MORE RECENT WEBTOON INVOLVING AN ORIGINAL PLOT? Yes, it is really difficult since most new webcomics are romances or isekai, and this one defied current trends. I would highly suggest reading it slowly as opposed to all at once. The art was very standard; nothing to write home about.

First season: Main protagonists Junam, a super soldier (pratically), and his niece Janglee are set on Nakwon Island. The development of Harmonia, a substance that prevents aging, came at a terrible, terrible, terrible cost—if you missed even one dosage, you would die.
Things I liked: The characters had depth, the author seemed to have done a lot of research to make it feel more authentic, did a great job of holding your attention.
Things I didn't like: main character body armor, and the author made the religious preacher seem nuts (sort of tired of this "plot twist").

Second Season: Determinated to restock on Harmonia, they returned to Korea. Another new main character for this season is Seunghyeon, a Nakwon native. Added the main antagonist of the season, the owner of Almighty Labs, the facility where Harmonia was created and produced.
Things I liked: Gave Janglee and Junam backstory, raised questions about Junam's past, and generally built up for a big climax of season three.
Things I didn't like: Some scenes were pointless (the whole orphanage thing), and Janglee had distinct DNA but did not fully clarify it/explain everything clearly.

Third Season: In my humble opinion, this was the best season overall. The main plot point of this season was Janglee's attempt to stop the creation of spring of life, a medication that reverses the effects of aging. It had an intriguing spy aspect that added to its appeal. This season really delved into everything, leaving no significant story gaps. It carefully finished the story with a hint as to what may be in store for Junam in the future.
Things I liked: Almost everything!!!
Things I didn't like: Some characters' deaths seemed pointless, and it was used just to kill someone off.

Overall, the plot was unique, interesting, and had broken the boundaries of modern webtoons. It had cliche villains, who felt needlessly evil. As my review says only the second season was boring but the third season can absolutely knock your boots off. The main characters felt like actual people and not just someone thrown together. I highly recommend this story as a modern thriller story.