Most of the main girls' themes can be found on Epidemic, I'll list a few music used in some scenes (Not all of them are on Epidemic, so you have to use YouTube if you can't find them):
Eva Scene : Torii Wolf - No One Knows But Me
Annie Scene (0.2) : Snake City - Run Boy Run
Penny Photoshot Scene (0.2) : Martin Baekkevold - Weekday Lounge
Nancy's Gym Scene (0.2) : Greylyn - Look into My Eyes (Instrumental Version)
Egyptian Plunder Scene (Nova/Maat, 0.3) : Katnip - Silverware (Instrumental Version)
Comforting Luna Scene (0.3) : Fiona Harte - What is Loving Anymore
Penny's Memory Scene (0.3) : Tellow ft. Lill Persson - Kids in Love
Forbidden Fruit Scene (Nancy, 0.3) : BLAEKER - Kill the Lights (Instrumental Version)
Let me know if you want to know any music that isn't included here. ;)