SPOILERS~
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They kiss, yeah and you should see siwon's face(▰˘◡˘▰) they went together to somewhere like date. Siwon have not said that how he sees him . after that when they are in elevator, jun kinda pissed or become sad or got angry then kissed siwon then elevator's door opened(because siwom said i am not sure about do i love you same way as you do).. Ta'Dah! That bastard (orange haired) came like "Siwon bro wtf, i liked you and..."
OMG IT'S HAPPENING!!!!!