phenomen a book

A young man from Earth finds himself waking up in a mystical forest that vaguely looks like a setting in a largely popular game from his world. He discovers that he''''s been transported in the clothes that he was wearing before the incident and having no possessions with him besides his phone. Upon closer inspection, all apps on his phone have either been removed or are unable to function except for the app indicating the text function. There''''s a bright red circle with a white ''''!'''' in the center, telling him that there''''s been a new message for him. When he opens the app, he''''s met with: