OMG PLS TELL ME HAM CAN HOLD HIS ALCOHOL BC I DONT WANT HIM KISSIN HIM ABSOLUTELY WASTED :...

Lolol don't worry, he knew what he was doing.
Also spoiler you can say.











I think he did that to see if he felt something for Yechan. I don't really understand Korean but ig after he did that. He was waiting to see if his heart was bathump but then nothing. So Yechan kissed him on the cheek and Yool smirked like he was happy or sum like that