ex-Syndrome members Vo.ASAGI, Gu.Ruiza, and Gu.SIN first form D. Dr.HIROKI is recruited to fill up the lineup.
Gu.SIN departs from the band; Gu.Ruiza is hospitalized around this time. D is forced to pause activities; in the meantime, ASAGI and HIROKI continue to play in their session band, Night of the Children, where they also perform alongside Support Gu.HIDE-ZOU.
D resumes activities as Gu.HIDE-ZOU joins the band.
D holds their first oneman live, Believe or not Believe, at Meguro Rokumeikan.
D announces their end of the year countdown event, Mad Tea Party Countdown 2016-2017 at Sanrio Puroland.
D abruptly cancels their countdown event due to financial issues with their event organizer, Pleasure Entertainment.