f(x) Luna and Kim Kyu Jong's 'Hamburger Date is becoming a hot issue online.

Luna and Kim Kyu Jong are appearing on TV Chosun 'Saving Gobongsil Ajumma'. The two, who always going at each other every time they meet, had a quality time after meeting up at a police station. They started to build on their feelings starting with 'Hamburger Date'.

The staffs said "Luna and Kim Kyu Jonh are about to build on their love relationship. Especially, the two are behaving with the same emotion outside the filming stage".

Photo: Eight