Time passed, for a very, very long time.
At first, the land was barren, and all things were silent and dead.
But one day, enormous mushrooms rose from the ground. They grew and absorbed the intense ultraviolet radiation. Beneath the protection of their thick mycelium, tiny life quietly developed. The mushrooms continued growing, spreading into vast expanses scattered across the world and repairing the shattered land. They desperately gathered resources from the sunlight above. Then, one day, giant insects began emerging from the mushrooms one after another. They traveled in swarms across the land, laboring tirelessly as they built one strange structure after another.
Day after day, the world quickly ceased to be so lifeless, but the unchanging scenery was still somewhat monotonous.
At some point, a little flower quietly bloomed in a corner of the world. Then came wild grass, enduring wind and rain as it stubbornly survived and blossomed. Trees rose tall and straight across the land. The enormous mushrooms withered and retreated underground, making room for life. The world gradually donned a coat of green, brimming with vitality, and all kinds of little animals began living there.
Among them was one such little animal.
Born into this world, she was curious about everything around her. Although they appeared to be slugs with two heads, they were actually sisters. They lived in a swamp, carefree as they rolled around in the mud.
The older sister was timid and gentle by nature. She disliked fighting and preferred a life of eating and sleeping, then sleeping and eating. She was easily frightened.
The Younger Sister, however, was lively and curious about everything. She could never keep still. Every day, she either dragged her sister around to bully flowers or went off to bully birds.
Whenever they encountered some enormous insects,