Two styles, do you mean the novel/manga or the ova anime ? If it is the manga could you tell me if it is with a different title Ash
There are 4 episodes (of course it doesn't do the novel justice but you kinda see the world they live in and the characters so it's cool) and 2 movies (from 90's? Anyway it was out way before the 4 episodes) apparently you can find them on YouTube
Wtf?!?!?!!!! Why isn't in anime?!?!!!!!! This website is for anime not a fucking novel!!!!!!