The Boku no Hero manga is finished. It reached its conclusion after a successful run, leaving fans with a complete narrative and memories of an exciting journey.
The Boku no Hero Academia anime is quite close to the manga. It captures the key moments and themes. Sometimes, there are visual enhancements or minor additions to make it more engaging for the viewers.
The manga of Boku no Hero Academia is typically ahead by a considerable amount. This allows for more detailed story arcs and character growth that might not be immediately covered in the anime adaptation. But the gap can vary over time.
Well, without having read 'boku ga yuusha de maou no boku de light novel', it's hard to say precisely. However, from the title, it seems to imply a story where the main character has a dual nature of a hero and a demon king. This could lead to all sorts of interesting plotlines, like internal struggles between good and evil within the character, or perhaps a story where the hero - demon king has to navigate a world that views these two identities as completely opposed.
It might be about a story where the protagonist has a dual role, being both a hero and somehow related to the demon lord. However, without actually reading it, it's hard to say precisely.