Ryua became an adult too early. When beasts destroyed her village and killed the local dwellers, she fled to the mountains. She tried to find any refuge but knocked into an abandoned hut. The place looked forgotten. Ryua fell there by chance and noticed 100 extra floors deeply under the ground which were guarded by an old severe male. A struggle was certainly the only way to liberate herself. When a battle ended she received prosperous power and left the prison. Her journey is based on treading a thorny path before reaching happiness.
P.S. Kansutoppu is a Japanese term which characterises a supreme talent that can be neither stopped nor counted.