@2AMkwon 이리 오너라~ 업고 놀자 사랑사랑사랑 내사랑이야~손춘향 조몽룡 오늘 몽땅뎐 많이 시청해주세요~

 I guess he's saying that he is Jo Moryeong 조몽룡 and Gain is Son Chunhyang 손춘향. (It's because they are wearing hanbok, it's the traditional dress in korea )

The real story of the pansori Chunghyangga, and the kodae sosol Chunhyangjeon, which the manga Legend of Chun Hyang is based on, is different from the comic. Chun-hyang in Chunhyangga is commonly known as a daughter between Wol-mae and Seong champan (Seong being a surname and champan being a title of government position in Joseon Dynasty Korea). Wol-mae is a retired kisaeng and, therefore, Chun-hyang is considered as a low class being (this becomes an issue when Mong-ryong, a yangban (the highest class) (and son of Lee Han-rim, satto of Namwon), tells his parents he promised to marry Chun-hyang and his parents get angered by the fact he wishes to marry a woman of lower rank).

 Photo Source:2AMkwon@twitter