Having released "Cute" last month with�10cm's�Kwon Jung Yeol, Byul has returned�with a new mini-album titled 'Nostalgia' to commemorate her 10th anniversary since debut.

Byul will be moving forward with music program promotions with her emotional title track, "You Are So Bad", to wrap up this special year for her.

Be sure to watch Byul's comeback performance below!