After Dungeons appear all of sudden at the world, some people becomes Awaken who hold powers and has been classified several class to each categorized. Jeon Yiseong lost his parents at first great dungeon, as well as the parents of his six bestfriends. They live like family together at young age. After Awaken as A Class Restorer,he joined to the dungeon with his D Class Hunter's friend and turn out to be disaster. He lost his friends and used his Restoration power to his dead friends, and became the only survivor for that incident. One year later, Sa Hyeon trying to recruit him to go dungeons raid together with his team, Chord from HN guild. Yiseon wanted to outed himself from the dungeon, but Hyeon' s offer is something he wanted all along...
A Trace of the Wonder