I don't have enough information to say exactly who Miu Sakamoto is in this context. They could be an author, a storyteller, or someone involved in creating this 'never ending story'.
Sure. It stands out because it plays on the expectations we have of a nichijou - style story. We expect light - heartedness, simple pleasures, and normal interactions. When horror is introduced into this, it subverts those expectations in a really unique way. It can make us look at our own daily lives with a bit of unease, wondering what could turn our nichijou into a horror story.
Well, it might involve the characters from a nichijou - like world experiencing horror in their otherwise ordinary lives. The cute and innocent characters could be thrust into situations where they have to face their worst fears. It could be something like a beloved pet turning into a monster, or the happy family home becoming a place of dread, all while still maintaining some elements of the normal nichijou setting.
The main characters in Nichijou Visual Novel are likely the same as in the anime. There's Mio Naganohara, a girl with a bit of a tsundere side. Then there's Yuuko Aioi, who is rather air - headed but full of energy. And of course, there's the talking cat, Sakamoto, which is a very unique and comical character.
Nichijou Visual Novel is based on the Nichijou anime. It typically features the daily, comical and absurd lives of its characters. You can expect to see the same wacky humor, unique characters and strange situations as in the anime in a more interactive, story - driven way through the visual novel format.
Sakamoto and Kouta are likely characters that fans have created a relationship for in fanfiction. They could be original characters, or perhaps characters from an existing series that the fanfiction writer has chosen to pair up in a new and creative way.
The 'Sakamoto Days' novel is mainly about a former top - tier assassin named Sakamoto who has retired and become a fat, unassuming man. But his past catches up with him, and he gets dragged back into the dangerous world of assassins. It's full of action, interesting characters, and unique fight scenes.