He isn't extremely posessive... He just likes to the world know that Taehyung is his... best friend.

Under The Mask

  Sungjong had always dreamed of being in love. Sungjong had never dreamed of being the idol he is today or being rich nor famous--all Sungjong had ever dreamed about was loving someone and being loved back. Now, though, being an idol had become something he had loved and adored, becoming an idol was the most amazing step of his life...

Sungjong loves dreams. He really, really loves dreams and things that aren't real. He loves Myungsoo too.  But Myungsoo is real, too real.  Sungjong hates 'real'. He really, really hates real.

It wasn't enough. When Sungjong rips apart his teddy bear 

You're Heart Breaks Hard When You Don't Have a Plastic Heart This is definitely a fact that Tae Lin has learnt.  Tae Lin is in love. Minho is not.         This fact makes relationships a whole lot harder to deal with. Especially when one who trust too easily falls in love with someone who one can't love. Roles will be reversed and attitudes will be changed, lives will be ruined and careers can be uplifted.  It's all a matter of whe

Myungsoo stared at him. His world was caving in around him. He felt claustrohpobic. His one love, his one future, his destiny was disappearing from his god-forsaken life. Now his life was SungJong-forsaken. That . Sungjong stared at him. His world was dimming as his light was fading. He felt empty. His one love, his one future, his destiny was disappearing from his in his god-forsaken life. He just hoped that his life would end Myungsoo-forsaken. That .