i've been watching radio star lately... seokyu maybe

I think Seohan, they seems had something. like, they're liking same snsd song. Luhan is known as his rubic skill, Seohyun ever post a photo on twitter 'a rubic and heart shape hand' and he like to steal a glance at her when they're in a same stage .. :D

I think YongSeo is still the most famous. Even my non kpop friends who only know Yonghwa through his drama know about this couple. :)

based on this, you can't actually know which is the most famous. For me,seokyu is the most famous. Even SM ship this couple. 'Unofficial official couple of SM' according to Kyuhyun

YongSeo will probably be the most famous until Seohyun actually begins publicly dating. Personal favorite Seo pairing is Hyohyun, tho. <3