Key is said to be sentimental and sensitive, even if it just a piece of paper from someone who he cares about, he will take really good care of it.
Key loves to shop in his spare time.
Key wrote all the raps
He is known to be a fashionista.
His dogs are named CommeDes and Garçons. Key made an Instagram account just for them.
Key has his own bag of special make-up tools.
Key once joined We Got Married Global edition and his on-screen wife was Arisa Yagi.
Because he nags too much, he was nicknamed "Umma" or Mother.
Key is really good at cooking.
Key was a big fan of TVXQ. He joined SM Entertainment because of them.