In/Spectre summary: When Kotoko Iwanaga was a mere 11 years old, youkai took her captive and demanded she become their "God of Wisdom," bridging the gap between the human and spirit realms. Despite the price of her left leg and right eye, Kotoko agreed, and now, after six years, youkai seek her advice for their issues. Meanwhile, Kurou Sakuragawa, a 22-year-old college student, recently broke up with his girlfriend after they confronted a kappa, leaving Kurou to face the creature alone. Seizing an opportunity to get closer to him, Kotoko sets her sights on winning Kurou's heart and eventually marrying him. However, she soon realizes that Kurou has a mysterious side to him. As she works with him to unravel supernatural mysteries, she hopes that their partnership will turn into something more.