5urprise's Seo Kang Jun and Kang Tae Oh appeared together on MBC's 'Radio Star', showing off their close friendship. 

The MCs said to Seo Kang Jun, "I heard that the younger Kang Tae Oh does not treat you like a hyung (older male)," and Seo Kang Jun replied, "He doesn't often treat me as a hyung.  He often teases me."

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Kang Tae Oh thought this unfair, stating, "Because you often play pranks. He enjoys being still and then suddenly surprising somebody," causing laughter. MC Kim Gu Ra commented, "What kind of household plays so many pranks?" and Seo Kang Jun replied, "We play around like that. We all gather and spin tops. None of us really like computer games."