Yeah, if it were IRL I wouldn't be ok with things like with the guys taking advantage of her. Although, there's nothing wrong with being a responsible slut. Either way, this story is fiction so it's HOT!
momi is great, and his art is stellar! The "Let's Go! ☆ Sakaki Minori-chan!" chapter alone makes the book worth getting, though I recently read the "WondARFul Peace!" chapter, and wow, hot doesn't begin to describe that story.
Reading Higenamuchi's afterword for overseas fans leaves me feeling happy. You definitely shouldn't be so modest Higenamuchi, you're easily one of my most favorite ero mangaka, and I look forward to your future work.
What a sweet and VERY erotic incest story! I love onii-chan's ahegao face on the second to last page, as it conveys oh so well how much he's enjoying cumming inside his sister.