Forbidden Fixation (Obsessed!Doctor x Male!Reader)

The New Offer - 1

Doctor Kisaku Haitani had been working at the South Ichiri University's psychiatry department for four years following his residency. He had seen all manners of patients from simple stressed-out college students to his own coworkers paying for an hour of his time.

...Only for him to tell them they needed to take so-and-so pills to alleviate their symptoms. In a word, Kisaku was bored.

When he first began studying psychology and psychiatry in college, he had learned all types of behavior. Manic, depressive, psychotic, traumatic; the list could go on for ages. He was always engaged, deeply involving himself with whatever psychological condition interested him most at the time. However, he found them, after a while, boring and easy to understand once he recognized the signs and symptoms.

Around his third year of college, he knew the ins and outs of practically every major mental illness. It was his third year, he hit a rather dry spell in his life. He was listless, uninterested, and dangerously apathetic. He was the type of person who needed constant interests to stimulate his brain. If those interests felt fleshed out, he'd search for new ones. If no new ones presented themselves as appealing, he'd try... more illicit ways to pass the time.

Needless to say, he was in a rather dangerous and chaotic place by the time his third year of study ended.

Fourth year though, everything had changed. Suddenly, all anyone could ever talk about was the Staten House Murders, named after the news team that had covered the story. His professors pulled up the developing case often in Kisaku's classes. It became the popular thing to assign coursework and papers evaluating the case from a psychology standpoint.

Kisaku could still remember quite vividly the gritty pictures in the newspaper and magazines that depicted a (age) boy in handcuffs, stoically staring the camera down. The footage of the boy's trial was never released to the public. All Kisaku and the rest of his classmates could work off of was the details of the case and whatever updates the media released about Y/n L/n. Their papers and theories turned out quite open-ended, and nonconclusive. It left Kisaku unsatisfied.

The unique, unexplained behavior surrounding the boy was admittedly what dragged Kisaku out of his mental slump. For months, his interest revolved around deciphering the boy's psyche from what little information he could glean. It was never enough. Kisaku, eventually realizing he couldn't mollify his curiosity from mere articles and media coverage, finally let his little pet project go.

It was unrealistic, after all, to diagnose someone as complex as Y/n L/n without even being their doctor, or allowed to view their files.

Kisaku had let it rest... in the back of his mind, where every few weeks (or anytime he became bored) he would carefully ruminate over it.

Y/n L/n. The boy who viciously killed three classmates while school was in session, only to come home and kill his parents. All in one day. What had set the boy off? There had been no history of abuse, no history of antisocial behaviors, and no recorded psychosis. So, what had caused a perfectly normal boy to kill five people?

It... fascinated Kisaku. Whatever the answer was, he wanted to figure it out.

The distant case of Y/n L/n still occupied his mind now, even though a patient was currently in front of him, going on about their own daily struggles.

The woman, Miss Furihata, was experiencing seasonal depression; Kisaku knew the signs well by now. He wasn't about to prescribe her any drugs for it but he would make holistic suggestions such as getting outside more or trying small doses of Vitamin D.

She was... boring. Thinking of Y/n L/n was not boring.

Kisaku tapped his fingers on his desk, impatient for this hour to be up.

"I've just been feeling so down lately, and I don't even get it. Usually, I'm a super peppy, super happy person..."

Kisaku stopped paying her any mind, turning his eyes briefly to the window in his office. The shades were down, minimal sunlight bleeding in through a multitude of thin slits.

When his watch said only a few minutes of their session remained, Kisaku quickly belted out his diagnosis and suggested treatment.

After seeing the young woman out, Kisaku hurried back to his office, ready to leave for the day. She had been his last appointment after all.

It was as he was gathering his notes, a knock sounded at his door.

"Come in," he called. He glanced over to see the head of the department, Dr. Aso, enter. The man was twenty years his senior and was extremely accomplished.

Despite his genial nature and razor-sharp intellect, Kisaku would always have a little friction with the man. For no other reason than Dr. Aso had been the latest psychiatrist offered to take a crack at Y/n L/n's case.

Of course, whenever Kisaku had tried to ask him about it, the man had shut him down with the patient confidentiality clause.

"Hello, Dr. Aso," Kisaku eyed the man. "What brings you here? I thought you'd be rather busy with your new case at the sanitarium."

"That," the man sighed, "is actually what brings me here, Kisaku. I've worked on that kid for nine months. I'm considering throwing in the proverbial towel."

Kisaku's eyes widened, finding the idea of abandoning an unresolved patient as fascinating as Y/n L/n unthinkable.

"Except that if that kid received successful treatment under my care, I'd be able to retire early. The payout from that publication would be no small fortune. So," aging eyes assessed Kisaku. Wizened hands clasped the back of the spare chair meant for Kisaku's patients. "How about you do me a favor, Kisaku?"

"What is that?"

"I want to give you the L/n case. I'll still be the overseeing physician on paper but you'll be on fulltime care for him. I just can't waste my time on him anymore. I miss the university."

Kisaku straightened immediately, his full attention caught. "You mean you're giving L/n to me? As a patient of mine?"

"You're the most competent man I've seen working at this university in a long time," Aso commended freely. "You're the only one I think would have a shot at it. So what do you say about a transfer to the sanitarium?"

"I'll pack my things now," Kisaku said in disbelief.

Aso only laughed, clapped Kisaku on the back, and said, "That's the spirit!" before leaving the man's office.

In a state of complete shock, Kisaku fell back into his office chair, legs feeling as stable as gelatin at the moment. He put a hand to his face, incredulous at this new and sudden turn of events.

This... this was his chance to satisfy a curiosity he's harbored since college. A chance to see for himself the mysterious mindset of one of the most notorious mass murderers in recent history.

Y/n L/n.