After School's Nana was pleasantly shocked when she was greeted with a surprise birthday party on the latest episode of 'Roommate'!

Although she caught wind of it early when the roommates weren't fully prepared for her earlier-than-expected arrival, she was still thankful for the impromptu surprise as the 'Roommate' members put on an Orange Caramel-themed show for Nana, who watched from the second floor with her special birthday cake!