SEE ALSO: 'When The Stars Gossip' finale leaves viewers perplexed and disappointed by its 'bizarre' conclusion

Yesung was accompanied by fellow Super Junior member Heechul, as well as actor Kim Jun, and Yesung's younger brother, Kim Jong Jun. Heechul first livened up the atmosphere by mixing up drinks for the crew, but Yesung, confessing that he'd become weaker to alcohol over the years, decided to go for a lighter shot instead. 

When Heechul mentioned not worrying over chart rankings with Yesung's 2nd mini album, the two began reminiscing about their deep friendship, with Heechul saying, "During a time when I had wanted to become very rebellious, Yesung and Donghae were the members who brought me back to the right path." Yesung added, "We talk on the phone a lot", while Heechul also followed up with, "We are the two Super Junior members who fought with each other the most." 

Yesung then launched into a live version of "Paper Umbrella" with an acoustic guitar in the background, wow-ing everyone present with his vocals! 

Have you been listening to Yesung's 2nd mini album 'Spring Falling'?