Roselia Live Flamme/Wasser is a 2-day live concert, as well as Roselia's sixth live. Each day of the concert has their own title. The first day is titled "Flamme" (German: Flame), and the second day, "Wasser" (German: Water).
It was held on August 3 and 4, 2019 at Fuji-Q Highland Conifer Forest.
The Blu-ray edition of Roselia's 2nd album Wahl includes a compilation of both days. It was released on July 15, 2020.
- Two special 5-pull gachas commemorating both days and featuring special Boost Drinks were held on BanG Dream! Girls Band Party! on their respective days.