After the earthquake that happened in Japan, Chaerin was forced to live with her parent's close friends in Korea. With that, she went to lived with them and later did she knew, they had a six sons. Being the awkward girl the is, she wasn't that comfortable around them, but they manage to changed her into a very beautiful lady. This made them grew closer than ever which led to fights between the boys that involved....Chaerin. 

"Annyeonghaseyo, I'm chaerin"

"Hi, we're your so called 'oppas'. Be a little comfortable around us will you?"