Hit or Miss

Harry Garcia is barely surviving university. Can't think of what to write in a creative writing exercise, has a morning routine that he gets stressed over, spends night on end catching up on classes, has a therapist to help with his stress, and learns martial arts to defend himself from bullies, since he's prone to them.
All of that changes when teen assassin Kylie Dexter murders the guy next door, his life becomes more stressful than before.