Sandeul a newly transfered guy in WM Academy with his other group members B1A4 , met Park Hyo Jin accidentally after 3 years again. Apparently Park Hyo Jin was Sandeul's first love when he was still in highschool. At that time Sandeul was still a nerdy guy, his situation was a bit harder since he was being bullied by some of his classmates, girls even make fun of him because of the way he