Since your birth, you've been raised for an experiment. You always have the best marks with another child, Chuuya. A day, the scientists decide that it's over and you can, with Chuuya, pass on the next step of the experiment. You say goodbye to everybody and the scientists lead you at another part of the building.

Inside, there are many big cisterns with hoses in. They explain to both of you that this is your new home. You're the Eve and Chuuya the Adam of this experiment, as the first subjects.