Choiza might have to watch out! Sulli gave Dynamic Duo Gaeko's son a smooch, and it looks like they had a bit of adorable chemistry.

Gaeko's wife posted the above picture to Instagram on September 29 with the message,"They had a couple look today? Happy birthday to Kim Tae Woo," congratulating her son on the kiss from the former f(x) member.

Looking at the picture, it does seem as if Sulli and Gaeko's son are in couple looks. What do you think?