PLSSSS HELP ME FIND THIS MANHWA (just the title plzz)

ok so all i remember is that this is a like a guideverse(?) bl, the main character was a brown hair gold(??) eyes who was pretending to be a b-class but in reality he was actually a s(s???)-class guide AND a-class esper. he had like messy hair, glasses, and a hat in his first appearance. he was getting tested for his class rank or something and for some reason the ml got suspicious of him and kept making him retake it (he was like black hair blue eyes)

i remember it rlly well so if u need more info then i can give it but im pretty sure just from the “being an esper and guide” part can give the answer? also idek if i have this in my reading lol