On the June 12 installment of SBS radio program 'Cultwo Show,' all of the INFINITE members appeared as guests except for Woohyun, who was preoccupied with filming for his drama.

The topic came up that the boys kissed one another on the cheeks to fulfill their promise to the fans after winning first place on Mnet's 'M! Countdown' on May 29.

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In relation to this, Sungyeol put in, "That was not a kiss, but just a peck on the cheek. For the next promise, if we make first place, I will kiss Dongwoo on the lips."

Dongwoo said, "At the time, we both said that promise, so I knew he said he was going to do it, but he came so suddenly that I was really surprised.  It did not put me in a good mood.  There was a lipstick mark, but it was a man's lips, so it wasn't that great," making everybody laugh.