f(x)'s Sulli posed for some adorable selca shots with her sunbae, CSJH's Sunday.

These pictures were revealed on online bulletin boards, where they have been gaining lots of attention. The two are not the same age, but they appear to be in these photos. It seems like Sulli's youth rubbed off on Sunday, because Sunday looks like she could be Sulli's school mate. Netizens wrote, "They are both pretty." "How can someone have such clear skin and a bright smile?" "Goddesses. Amazingly gorgeous." Sunday is currently preparing for a musical with SHINee's Onew, CSJH's Dana and TRAX's Jay.