All of the characters are from the webcomic Dumbing of Age, or the comic Shortpacked!, both created by David Willis. Shortpacked! takes place in the Walkyverse (a series of other comics) and Dumbing of Age takes place in the Dumbiverse (a universe comprised of characters from the Walkyverse reimagined as college students attending the school Willis went to). All of the stories except for the second and third one take place in the Dumbiverse, and feature characters that are in college, whereas the other two feature characters in their 30s. None of these characters are under 18, although most of them are *exactly* 18.