Baek Sijin, who was appointed as a Diagnostic Examiner at the F12 Center where Esper Ham Geonwu — the savior of his life — was located, eagerly headed to work. However, little did he expect that an unexpected wall awaited him there.

“If you really have no interest in Ham Geonwu, then there’s no need for you to make things difficult for me. Isn’t that right?”

This was none other than Jeong Taeyul, an A-Rank Guide who boasted a high matching rate with Ham Geonwu.

Jeong Taeyul stuck close to Baek Sijin, displaying a spiteful side of him by checking (?) every little thing. It would be nice to hate him all the time, but Sijin, with his strong professional conduct, finds himself constantly concerned about Jeong Taeyul due to his consistently poor examination results…

A meeting between an A-Rank Guide and an ordinary, powerless bottom! What kind of ending awaits their relationship, which began with such hate for each other?