[Deadline to receive bonus for purchasing all 6 titles: Nov.7, 2021 *Offer is Over](Happy Around!, Photon Maiden, Peaky P-key, Photon Maiden, Merm4id, Rondo, Lyrical Lily) Merm4id, a unit formed by university students appearing in "D4DJ", a new media mix project by Bushiroad based on the theme of "DJ". The music producer of the unit is Kazushi Miyakoda.