According to JTBC, ŌĆ£BoA and Sung Si Kyung are making an appearance on Knowing Bros. Recording and air date will be in mid-July.ŌĆØ BoA and Sung Si Kyung are currently judges on MnetŌĆÖs Voice Korea 2020. There is great attention to what kind of chemistry these two legendary musicians will create with the Bros. Source (1)