Daina Marisa 3D (ダイナマリサ３Ｄ, lit. "DynaMarisa 3D") is a 3D third-person Touhou Project shooter fangame released byTwilight Frontier that parodies Sandlot's Earth Defense Force 2017. This game features stereoscopic 3D graphics, activated by through the Options menu, this allow for 3D graphics on computers using video cards that support for stereoscopic 3D graphics.
One day, Marisa Kirisame decides to break into the Scarlet Devil Mansion's library to "borrow" some of Patchouli Knowledge's books, as usual. However, this time she was caught off guard as she was surrounded an army of heavily-armed fairies and ant-like robots all under Patchouli's control. At Patchouli's command, the robots all fired Marisa with a barrage of gunfire. Defeated, Marisa flees from the scene and swore revenge against Patchouli as she prepares her own army of fairies, the Patchouli Defense Force, and an arsenal of weapons of her own to combat Patchouli and her legion of fairies and machines.