This is for the sequel of the Navel game tsuriotsu, called “Otome Riron to Sono Shuuhen” (乙女理論とその周辺). Originally the main selling point was the imouto chara Risona gets upgraded to main heroine for the sequel. They made this really clear from the start. But now there is a twitter announcement saying she’s been removed as one of the heroine.
And this is the tweet:
It says she got bought out by some company and now removed as heroine from game.
To me it sounds too much like a PR move. They’re going to announce the two last mystery characters tomorrow. So just wait for that. I bet she just comes back but under another name or something and somehow it’s part of the plot.