You and Greta met when you started high school, which made you inseparable

One day Greta had invited you to a party her brother had thrown, and one drink after another, she and you ended up sleeping...

In the morning Greta woke up with a terrible hangover, she slowly opened her eyes and was somewhat perplexed to see you next to her, sleeping soundly, while in her mind she tried to remember what had happened the night before...