I read a hentai diujinshi that was this

O_O

Oppai Daisuki!

I Like Big Tits!

Yo mina! Damn Ane Kyun! was awesome! I’ll start with the biggest thing I’ve noticed… the voice actors for the girls are so KAWAAIII, I love the sister’s voice, it’s the cutest and makes me think of lolis, and Akazaki’s voice suits her provocative and daring personality, they’re both cute and pretty, at first I was for the sister but at the end I’m hesitating like crazy >.<
The sex scenes were good, the threesome one was such a troll, I thought it was true when Hirokazu dreamt about it it, and the scène with the sister was satisfying. I was kind of worried that Akazaki didn't really love "Hirocchi" but she admits it at the end, damn I so want a next episode that's obviously finishing in a threesome, the sister was so jealous at the end, I did my research and saw that there's a manga with the continuation so I might read it, I learned that the sister's name was Honoka.
That's all! Bye guys o/