When Mashiro awakens in a distant and confusing future, she's faced with a new reality where humans no longer exist. While she grieves her lost family, friends, and old life, she is also faced with four pushy and impatient non-human suitors. Despite her hardships, Mashiro still wishes to live, but as this new world isn't conducive to human life, she's going to have to rely on her intimidating male caretakers. Because without saliva-or other fluids-contributed by her celestial paramours, her life on this earth will be cut short!