Watch the video HERE. You can see he has a notebook ready and the manager takes it before he can even get to her. The other fans are cheering because, according to other fans, this guy is notorious for being a SUPER creep towards her.
He was planning to show her this:
'If I'm lucky, I will get to date these type of women next year. But for now, please listen to what I'm saying. I concerned a lot whether if I should say this, right in front of you, right now. But anyway, Kyulkyung, you're really perfect to me. This worthless heart of mine, will keep on loving you for a long time, until you turn into this, Kyulkyung (pictures). This is my Christmas in May present for you. Kyulkyung-ah, I love you!' (Basically a rip-off of Love Actually)
He is also known on the fan cafe for spreading rumors that Pinky and him have a secret relationship:
He has written a lot of things online like how he basically wants to sleep with Pinky and all kinds of innappropriate stuff :(