What is the relationship between Kokoro Botan manga and Rock?

Not much really. They are just two separate entities in the manga world.

The best way to legally get Kokoro Botan manga is to purchase official releases. But if you insist on looking for raw versions, try doing a deep search on less-known manga sharing platforms, though there's no guarantee of finding what you want and the legality could be questionable.

I'm not quite sure. Maybe it's related to a specific manga or a character feature, but I need more context to be definite.

The Kokoro Connect manga adaptation on Manga Rock is decent. It mostly stays true to the original story but might have a few minor differences.

It could vary. Sometimes the anime adaptation of a manga like 'Boku no Kokoro' might make some changes to fit the animation format or for storytelling purposes. But the core plot and characters should remain similar.

It's hard to say exactly. It could be that Rock is a character in Sun Ken Rock manga, or there might be a musical influence related to the term 'Rock' in the context of the manga. But without more details, it's difficult to be definite.

The Mashikaku Rock manga might incorporate elements of rock music, like characters inspired by rock musicians or storylines related to the rock scene.

Well, it could be that the 'rock' aspect refers to a style or theme incorporated into the Black Rock Shooter manga. Maybe it influences the characters, settings, or storylines. But without more context, it's hard to say for sure.

Not much. Manga Rock was a platform for accessing various manga, but its use might not have been legal for all content, including 'Oreshura'.

Not much. They are likely two separate and distinct manga with no direct connection.