On the February 18 episode of Mnet's 'Beatles Code 3D', the BTOB members appeared as special guests and talked about their dorm life.

They said, "Eunkwang does not wear a single thing and walks around stark naked." Eunkwang responded with a red face, "Because I came out of an all-boys middle and high school, I was comfortable about it and showered in the bathroom even during my school days."  

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Ilhoon said, "One of the members came from Chicago and really hated [that Eunkwang went around naked].  Sungjae is like that, too.  No one has ever seen Sungjae naked."

Sungjae said, "I've always really hated stuff like that," and said he never showered with the other members.

Making everyone laugh, Eunkwang said, "I think if I shower with Sungjae, only good things would happen this year."