Hagane Orchestra

Self-aware parodies of anime featuring merchants in a fantasy world. Both constantly poke fun at themselves and their own functions/budget. 

Light-hearted parodies of mobile games that are also advertisements for their own mobile games, set in fantasy worlds and with a self-aware humor. Last Period has a collaboration with a very famous franchise, while in Hagane Orchestra they cosplay as characters from famous franchises. 

Hagane Orchestra and Vampire Holmes are short and simple anime that are both about a cast of characters trying to promote their businesses (Selling vehicles in Hagane Orchestra and solving mysteries in Vampire Holmes) and their various schemes to make money. They both originally came from a mobile game as well. 

Both are short anime that are cynically self-aware of the fact that they were only made to sell a product. Most of the run time is devoted to meta humor criticizing and deconstructing the appeal of the very product they were meant to promote. 

Both are promotions for a mobile game. Hagane Orchestra promotes a game with the same name, while WagaHai doesn't even promote the game it adapts (it promotes the game KakoTama) So if you are looking for a proper adaption, you won't find it here.