Ein's Sword

It is a time when sword saints reign supreme. In a world where the sword is the only way to show one's power, everyone is eager to obtain it. Then, Ein hears a rumor of a legendary sword. The Lost Tower, which is said to reach to the sky. In the top of the tower, there is a sword that can make any wish come true. Ein immediately headed for the Lost Tower. There was more to the rumor. No one who has entered the Lost Tower has ever returned home. Will Ein be able to obtain the legendary sword?