A teenager who dropped out of school and stayed at home for two years suffered from mild autism and social phobia due to being alone for a long time. His favorite thing to do is to use binoculars to peek at the daily lives of his neighbors.
His ordinary life changed when he picked up a key... Because this key is said to be able to open any lock...
(First person, if you're not used to it, don't read on)
(Urban superpowers can also be regarded as science fiction, but they are not scientific anyway)