Mark Goldstein is far from being an average 16-year-old. 5 Seconds Of Summer are the farthest from being 4 normal teenagers. To make them even less normal, they adopt another teenager, Mark Goldstein. ¯\_(ツ)_/¯ The first few chapters aren't very good so if you're planning on not reading it after the first few chapters, just stick around! My writing got better and it doesn't look like a 5 year old wrote this.