Navii's manga / #Apocalypse(1)

This comic has its game mobile, called Punishing Gray Raven. I have been playing this game for some days and it seems the story plot was before the story in the game. The game its self like the honkai impact but a lower version and has playable male characters. I think the story will center on the trio in the first chapter. Lucia - red horn girl, Lee - blue horn boy, and Liv -pink horn girl