prologue/Main character info

One twin goes missing after accepting an invite to the white guardian academy that promised him a good job after graduation that paid well. With the family being poor and without parents or family the twin thought it was the best choice to go. Jwa mooyun, A worried sister looking for her missing brother after he didn't come home at the time that was guaranteed he'd graduate. Searching across the whole country to find him and what's behind the academy that never existed in the first place.