The only S-rank guide in the country, Yeon Haegum, has someone he has been secretly in love with for a long time—Seo Munhyun, an S-rank Esper who has cared for him like a brother and father figure since as long as he can remember.

He taught him how to eat, read, write, and even how to guide. However, Munhyun is now engaged to the daughter of a prominent government official, a fact he has yet to tell Haegum.

“…Hyung, are you really getting married?”

“Haegum, even if I do get married, nothing between us will change.”

Just as Haegum is preparing to give up on his unrequited love, Munhyun’s twin brother, Seo Munhyuk, appears.

Desperate to find a guide compatible with him to boost his career and status, Munhyuk sees Haegum as an essential part of his plans.

“Why not use me as a substitute”

“…….”

“Since me and Munhyun are identical twins, our bodies look exactly the same too.”

Faced with Munhyuk’s tempting offer, who looks just like Munhyun, Haegum finds hi.self awakening to a new pleasure…

“I have no intention of sharing you with someone else.”

The controlling and obsessive Seo Munhyun.

“I don’t mind if the three of us do it together, as long as the guiding works.”

The carefree Seo Munhyuk, who sees guiding and pleasure as a fun combination.

Caught between the two brothers, which one will Haegum choose?