"A small percentage of people between the ages of seventeen and twenty-four awaken as espers! Using esper powers causes backlash, with bespoke acute symptoms and generic chronic ones. Awakening consists of a week of quality fucking time with one's very own acute symptoms. Usually it's something that more closely mimics a medical condition than this, like, people get fevers or neuropathy or they go blind or something like that, but I have this instead. At the end of the week in theory I will be all better, till I use my powers, which I'm not going to do if there aren't any other espers, because the way to get rid of non-awakening backlash is by hanging out in close proximity with a compatible fellow esper."