Sunghoon thought she was trying to play hard to get during Cool Kiz but he never thought it was because of another reason. He thought he could win her heart over if he didn't rush into it. He thought she'd understand how he felt even if he didn't vocally express it. He always thought they had a connection... an emotional connection after the night they had gone for drinks with the rest of the cast members. 

Never did he think... 

Never did he once imagine failure.