Lee Sungyeol, that was the name he was born with. Like his rather cute name, the boy himself was a quite energetic and outgoing person. His face always shine brightly with joy and happiness around. whenever he smiled, his adorable gums showed up just like that. Well he was actually 22 years old already, but everyone called him 'choding' which means elementary kid due to his childish and whiny behaviour. However the boy should learn, sometimes that personality of him didn't always bring fortune. At least once he met someone with exact opposite traits with him. A boy nicknamed L, who totally turned the table of Sungyeol's life, 180 degrees into what might be addressed as hell.