Kai is a 39-year-old bank employee. Kai has been described by his colleagues and management as a well-spoken, tidy employee who is always polite and eager to assist his clients. However, over the last two weeks Kai’s behaviour has changed markedly. He refuses to use the bathrooms at work, explaining that the newly installed hand dryers pull thoughts from his head out through his hands. Upon a colleague’s suggestion that he need not use the hand dryers but the paper towels provided in the bathroom, Kai became irate, accusing his colleague of conspiring against him. Kai has become progressively difficult to understand, often confusing customers with his responses. If Kai's symptoms persist for the next four months. The company psychologist would give a DSM-5-TR diagnosis of - - - - -?