Toheart members SHINee's Key and Infinite's Woohyun revealed chemistry between the two.

In Mnet entertainment program "Beatles Code 3D" aired today, Toheart came out as guests and revealed their nicknames for each other.

The two said, "We have nicknames for each other. It's 'My Hyun' and 'My Bum'. Key's real name is Kim Ki Bum so I call him 'My Bum'."

They said, "We don't always call each other by that. We just say it when we meet. We start off the day with those nicknames."

They also talked about how they got close. Woohyun said, "I went out on a radio program once and got Key's number as a gift. After that, we got close."

Photo Credit: Mnet