★ The latest work from Yomi Minamihara, winner of the 20th "This Mystery Is Amazing!" Grand Prize! A former engineer turned in-house patent attorney delivers a fresh campus suspense thriller!
★ A university professor's meticulously crafted exam questions are secretly swapped on test day—starting with the manipulation of university entrance exam math papers, the suspense builds layer by layer!
★ The rigid and stern associate professor paired with the popular math YouTuber—this mismatched duo joins forces to uncover the truth, creating a novel and intriguing character dynamic!
★ Confronts the hot-button issue of "exam fairness" that concerns everyone, questioning through layers of twists: Who is manipulating admissions? Where does the truth really lie?
★ What kind of conspiracy hides behind the "vanished exam paper"? A math test that determines the fate of countless students—come and uncover the mystery together!

Sugawara is an associate professor at a comprehensive university, known for being rigid, stern, and unpopular in the lab. Despite this, he is put in charge of creating the math questions for the entrance examination. He meticulously designs what he believes to be perfect questions, but on the day of the exam, the test-takers are faced with an entirely different set of problems! The author of the fake questions is unknown. Could someone have swapped the papers at some stage to manipulate admissions through unfair means? Faced with this unprecedented scandal, Sugawara teams up with his acquaintance Shiraki, a math YouTuber, to investigate the truth—so, what is the correct answer?

Yomi Minamihara
Born in Tokyo in 1980. Completed the master's program at the Tokyo Institute of Technology (now Institute of Science Tokyo) Graduate School. Former engineer. Currently works as an in-house patent attorney.
Won the Grand Prize at the 20th "This Mystery Is Amazing!" Awards. Made her debut in 2022 with her award-winning work, retitled "The Queen of Patent Infringement: Patent Attorney Mirai Ootori" (published by Takarajimasha). Other works include "Wink Warning: Intellectual Property Department, Seisuke Hirama" (published by Kobunsha).