What is the relationship between oto x maho manga?

I'm not sure exactly. Maybe it's a spin-off or a related series. But without more context, it's hard to say for sure.

Honestly, I have no idea. 'Oto x Maho manga' and 'park' seem quite unrelated. It might be a mistake or something very specific and uncommon.

Yes, the oto x maho manga has been completed.

One common theme could be friendship. Oto and Maho might be portrayed as having a deep and meaningful friendship that overcomes various obstacles. Another theme could be adventure, where they go on exciting journeys together.

It's quite distinct. 'oto x maho' has its own unique elements that set it apart from many others in the genre.

I'm not sure of specific oto x maho fanfiction stories off the top of my head. You could try searching on fanfiction websites like Archive of Our Own. They usually have a wide range of fanfictions, and you might find some interesting oto x maho ones there.

I'm not really sure. Maybe they have no direct connection.

I'm not really sure. Maybe it's a crossover or some kind of related theme, but I don't have a definite answer.

Not much. 'Kono oto tomare sounds of life' manga is a separate entity and has no direct connection to Rock.

I'm not really sure. I haven't come across much about oto manguean and its connections to other things.