At Lee Sora's 'Second Proposal', Heo Young Saeng was one of the guests and he performed 'Hello Mello'. Here is a fancam from Madeleine [http://heoyoungsaeng.com] that has already been posted in yssilver1103 YouTube channel.
Please DO NOT edit and upload video in any streaming sites including YouTube.
Young Saeng is sooooo cute. Love his 'Hello Mello'.