Hello Pro ANNEX ~Kobushi x Tsubaki = Sweet♪~ (ハロプロANNEX ～こぶし×つばき=Sweet♪～) is a fanclub event featuring members of Kobushi Factory, Tsubaki Factory, and Hello Pro Kenshuusei. Six events took place from April 18 to 20, 2016 at DMM VR THEATER. The events featured talk, games, and a mini live with a different group of four members each day.