
Quick answer — Keita Haga worked on Fate/Grand Carnival (Music), Learning with Manga! Fate/Grand Order (Music Production Assistance), Fate/stay night: Unlimited Blade Works 2nd Season - sunny day (Theme Song Lyrics) and 1 more anime.
Keita Haga worked on Fate/Grand Carnival (Music), Learning with Manga! Fate/Grand Order (Music Production Assistance), Fate/stay night: Unlimited Blade Works 2nd Season - sunny day (Theme Song Lyrics), Carnival Phantasm: HibiChika Special (Theme Song Composition).