Boku ga Kotaeru Kimi no Nazotoki

A high school counseling teacher's assistant, Rinne Akegami, is an introverted individual who has the ability to identify the perpetrator of any crime, though she does not understand how she does so. Touya Iroha takes on the task of deducing the reasoning behind her conclusions in an effort to uncover the truth. His role is to support her while working to understand the source of her insight.