A recent twitter conversation between singer BoA and actress Shin Se Kyung has proved their close sunbae-hoobae relationship! On November 25th, Shin Se Kyung uploaded a set of cute photos on her twitter which had BoA responding with, "Se Kyung, cute~~~ hehe". [gallery] After receiving the warm response from her sunbae, Se kyung asked BoA, "Unnie, where are you right now?" to which BoA hilariously answered back with, "In your heart...keke. I'm just kidding, I'm going to Japan~~You're doing well for your drama shoot right?! Let's see each other more often next year ^^". Concerned about her sunbae's well-being, Se Kyung responded, "Ah...I thought you were in the States....I celebrated your birthday through Kakao Talk TT_TT. Have a safe trip. Be careful of catching a cold!" In related news, BoA will be releasing her single DVD, 'Milestone'  on December 7th in light of her 10th anniversary in Japan. The singer will also hold a concert on December 10th at the Tokyo International Forum in celebration of the Christmas holiday. Meanwhile, actress Shin Se Kyung is busy shooting for her SBS drama, 'Deep Rooted Tree'. Source + Photos: mtstarnews via Naver