I've read Jongsuk watch television since he lives alone and made reference to FBND in the past... Which means he followed this kdrama on TvN.
I need to look for that comment on his interview... Hmm.
Eureka !!
" When you watch the drama Flower Boys Next Door, the heroin learns about the world through TV. I really understood that. That's the way I live as well." - JongSuk's interview for K-WAVE Magazine ( May 2013)
-source: pinocchio soompi thread via khjpearl