Lee Suan is the main vocal of a popular Korean idol group of 7 years, "iridescent". After 7 years of his life as an idol which was filled with rumours of conflict and exclusion within the group, he decides to retire at the young age of 27. After a succe

One day, a tower appeared in the skies of all the major cities… 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. Walkers could now "retur