Crossover Anime: A Railgun for the Birth of a King

[Various Anime/Anime Crossover] [Multiple Female Characters] [Main World Daily Life] [Dungeon World: Letting Go] [Protagonist X Repressed]

A salute to the birth of a king? Just shouting slogans is so boring. If you're going to say there are cannons, then there should actually be some, but what kind of cannons...?

Currently included worlds: Saekano, Oregairu, Fate...