On May 28, Bada, along with S.E.S. members Eugene and Shoo, attended a charity event, Green Heart Bazaar. Bada released special album title "Flower" on June 13, 2016 to celebrate her 20th debut anniversary. The single contains four tracks with lead single "Flower" featuring popular rapper Kanto. She released double music video for "Flower " on June 13 and "Amazing" on June 15. A few weeks later, Bada released special summer album title "Summertime" on June 26. Bada later released collaboration single "Cosmic" with Super Junior's Ryeowook on September 22, as a part of S.M. Entertainment project SM Station.