This does sound like Key, but it could also be Heechul. Key abruptly got nervous when it was his turn and suddenly said "Wait I don't want to come on this show next time, really. She's about cm so a little below 5'5. I found this on Pann, a Korean forum website. The four other members of SHINee actually never dated! Key's favourite food is Italian food.
Comments in the forum think it's Kwanghee from Z:
Soyou Names SHINee’s Key As Her Closest Male Friend
That for a company registered in the united kingdom, or another member state is responsible for its own and having them over for dinner. They took a superb start in by clinching the top 8 position at super hits chart. Let's just say, evidence of Key being gay far outweighs any of him being straight. Could easily be something someone made up. Who is the girlfriend of key os shinee?