man with a mission
Japanese band. Gained popularity due to creating the opening themes of Log Horizon and Gundam Tekketsu no Orphans. They also created the theme song for New Japan Pro Wrestling's 28th G1 Climax tournament in 2018.
Also popular with some Fate/Grand Order fans (particularly Arash), due to one of their B-sides for "Raise your flag" being titled "Stella".