Synopsis: Tesoro of the Guide

Baek Sijin has been appointed to the F12 Center as a diagnostic examiner, where his savior, Esper Ham Geonwoo, is also employed. With a mix of nerves and excitement, Sijin arrives at work, only to encounter an unforeseen challenge that awaits him. "If you truly have no interest in Ham Geonwoo, then there's no need to feel so tense around me. Am I correct?" This challenge comes in the form of Jeong Taeyul, an A-rank Guide who is highly compatible with Ham Geonwoo. Taeyul attaches himself to Sijin, persistently interfering and attempting to keep him in check. Although Sijin finds him bothersome, he can't help but pay more attention to Taeyul than he desires, particularly when disappointing test results activate his sense of duty. Could this mounting tension result in something unforeseen?