Gene ~Shikenkan no Naka no Shoujo-tachi~

In the middle of 21st century small sun burned down everything on the planet Earth. However, humanity survives in underground shelters dreaming of reviving life on the planet. In such difficult circumstances "Artificial Genetic Girl Project" (AGGP) is launched to change humanity. Main character becomes a member of research institute to create and train artificial girls.

[From vndbreview]