No, 'After' isn't based on real life. It's a made-up tale. The author likely came up with the ideas and scenarios to entertain and engage readers without being tied to actual happenings.
The 'After' books are not based on a true story. Although they might seem to depict some real - life situations, like college life and relationships, they are products of the author's creativity. The characters and the specific plotlines are made up. For instance, the elaborate love triangle and the extreme situations the characters get into are more of fictional constructs to create drama and keep the readers interested. It's all about creating an engaging fictional world rather than basing it on real events.