Super Junior's Kyuhyun talked about his friendship with B2ST's Doojoon on the November 23rd episode of 'Weekly Idol'.

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Kyuhyun revealed he and Doojoon swore to be brothers because they had the same blood type, A, while drunk. He said, "I don't really remember because I drank too. There are things I found out because it was said on a broadcast."

The Super Junior member then gave Doojoon a call, saying, "Doojoon. I'm sorry that this is the first time I'm calling you. You're doing well, right? We had fun that one time." The B2ST member then responded surprised, "We did? When?"

Kyuhyun reminded him, "We had a drink last year after meeting coincidentally. What kind of relationship do you and I have?" Doojoon quipped, "An awkward relationship," adding, "I saved hyung's number, but he changed his number and didn't contact me. I thought maybe he was really drunk at the time."