My Friend's Younger Sibling Became My Guide

Willow Ryu, Sunlight Hee. Choi Yu-hee. Though an S-class esper, his low compatibility with guides meant he was destined to become a willow branch withering in the sunlight. That is, until Shin Jae-yi, his friend's younger brother whom he parted ways with seven years ago, appeared as an S-class guide. "Hello, Yu-hee hyung. Long time no see." ~EXCERPT~ The awkwardness was fleeting; Shin Jae-yi and Choi Yu-hee were soon as close as if they had never been apart. "Yu-hee hyung...." "Why? Are you sick somewhere? Or should we turn off the movie?" "I'm a little scared... Can I come closer to you?" And so, a romance begins that only the two of them, or perhaps only Choi Yu-hee, is unaware of, an...