The stepsibling thing is a common manga trope, idk why people still get shocked by it haha. And yeah, if people are offended, they dont have to read it. As for me, I really like this kind of plots, Kagamine Rin and Len have forever corrupted me lololol.
Anw, Thanks to the translators for picking this up!!!! Please don't get discouraged by any negative comments, there are plenty of us who are happy to see this updated ❤️❤️