Ylomev
It is a world created by Takahisa Mayu and Midori Daiki, game creators. The name is an anagram of "My Love", they created two continents one for each of their games.
The West Continent belongs to the SINFUL PLEASURES' game -an otome- while the East Continent belongs to THE LAST VIRTIU's game -a party forming, dongeon-monster fighting game.
This is the setting Olivia's story.