Before Jaehwan was summoned into the Tower, he was serving in the South Korean military, which is a mandatory requirement for the country's men. It is unknown if he willingly entered the service, or if he was mandated to do so, but it is known that he achieved the rank of Sergeant. Jaehwan is a person who can contextualize with little information and see the bigger picture. He gets straight to the point, avoids useless explanation, and always seeks answers. He saw through Demon Beastlain's deceptions and discovered the truth of the Tower. [4] Walkers could now “return” to the past. Slowly, everyone left. . . Humanity’s last hope, “Carpe Diem”, was formed, made up of people who refused to abandon the world. . . The last Walker reached floor 100. After the abused soldier killed everyone and spared Jaehwan, he placed the rifle's nozzle into his mouth, and committed suicide. Before he did, he looked at Jaehwan and said, "Thank you for everth..." but didn't say the last word because the bullet tore through his skull, which caused blood and other cranial liquids to leak out. Jaehwan witnessed everything, and realized he wasn't killed by his own gun. How the shooter acquired Jaehwan's rifle is unknown.

Every color uses many variants of it to support the original color, and the linework of this series is drawn to utmost perfection. Jaehwan stumbled upon the incident and saw the dead bodies littered with bullet holes, and the abused soldier standing over them while muttering, "Bastards... Bastards..." Jaehwan walked towards the soldier, but didn't know what to do. He met Demon Beastlain on the 100th Floor, who informed Jaehwan that the Tower of Nightmares was a tutorial. [7]This ability allows Jaehwan to read the minds of others, although it is imperfect. This power gives him the ability to acquire hidden information. This allowed him to realize the truth of the Tower of Nightmares. When using the ability, the webnovel states Jaehwan can see particles, and these particles are different in shape, form, and color. When these particles interact with a person, they can form words, hence the mind-reading. As Jaehwan was serving in a battalion, an abused soldier killed his fellow squadmates and superior officers, but spared Jaehwan. The soldier killed everyone else because he was suffering from mistreatment, but didn't kill Jaehwan because our protagonist did not participate in the bullying. The story invokes the readers’ emotions, and this series can mean a whole new branch of genres. The artist and the authors are geniuses for creating a whole new world of fantasy, and the series does have many creatures who are also completely original, however, influenced by mythology.

On the 32nd Floor, he managed to survive the "Shadow Cavern Trials" for a month. The webnovel states, "It was the first time when his [Stab] had become powerful." Humans were suddenly summoned to become “Walkers”, and they needed to clear the tower to save the world. . . Floor 77: The “Stone of Regression” was discovered. Jaehwan was raised by his mother and father until the age of ten. After an incident, he was only raised by his mother.Jaehwan finally became alone when Yoonhwan plummeted from the Tower of Nightmares, who was gravely wounded by Boss Monster Giltikas of the 98th Floor. Because of this, he resented the people who returned, and subsequently disliked people who lose themselves in their own romanticized memories. Jaehwan developed a mindset of living in the present and marching towards the future. nowadays not only is a good means of entertainment that is good for your mental health but also save