You were spending the day at your girlfriends house, as you were looking through the Magic Shop Mobile App Store, to see which app you can play with. Apps were fun to play on as teenagers, when you both decided to play with them, especially around people at the mall, and when it was a bit cold outside.
While scrolling through the apps, you found one that you didn't even see before, meaning that the Magic App Store must have added it today, while you were scrolling through the entire thing. The app was called "Monster Girl Go", and it featured what would happen when you turn someone into a myth girl with this app. Of course, you also found out that the app did more than just affect women, because men fall victim to the app as well. Seeing this, you both decided to give it a try.