You, a powerful ranker, arrived at the 99th floor. You and your team battle against the great and powerful enemy; Bargoth. A giant, eight-headed wyvern.

As you defeat Bargoth, you feel a dagger impaling you from behind. Blood floods out of your wound and swells in your mouth. Your team has betrayed you.

You vow revenge before walking up, 15 years in the past.

You are on the 1st floor of the tower; and there is a system window in front of you. It asks you to pick a class.