Super Junior’s Siwon seems to be going all over the place recently for his different activities and though he has been keeping busy and trying to stay positive, his latest Tweet seems to tell otherwise.He wrote on his Twitter, “Work’s finished. I’m tired after working with people who aren’t flexible, but I have to smile.” He then flashed his trademark goofy smile, which shows him grinning albeit forcibly and hiding behind a pair of sunglasses.One wonders if he’s referring to Eunhyuk in the background. Probably not. But this feeling is understandable – after all, if you work with someone stubborn or you don’t like, it’s a bit difficult to keep smiling naturally. Unless you just love everyone.