It's a visual novel telling the story about the life of 2 brave sisters who fight and struggle to bring to entire humanity the greath dream of immortality and eternal youth. The main character is Sophia, a young woman and then her beloved sister Aisha. You can control the history with your choises.
In order for you to be able to install this game, you need to enable (allow) installation of applications from unknown sources (Unknown sources) in the phone settings. Usually this item is in the Security section