Dungeon Zero

Inspired by the hero stories. Retto decided to become a knight and someday acquire the title of hero after defeating the demon king. While working hard he fell in love with a cheerful girl named Yunis. Yunis represents every color in Retto's world. The two fell in love with each other. Until the tragedy happened in their mission. Yunis was taken by the demon king Ennel. Retto was killed but mysteriously found himself in a dungeon. A dungeon is unknown to anyone. In a dungeon, only people chosen by the dungeon can enter. Retto's journey of finding a way out in the insane dungeon to save Yunis started.