I have a Japanese manga app on my phone (マンガZERO) and this is apparently popular enough that it was on the front page. I didn't know what it was at first, but I kept reading because I like yuri stories. But this isn't a yuri story. It's a revenge story where the main character uses sex to get back at people who bullied her in middle school, and the main character is bisexual. In the first story, she seduces one of the women who (I think) bullied her, but she also seduces men. The entire second story is about how she convinced a man (marriedto one of her former bullies?) to rape his female subordinate at work.

So, yeah. Not yuri. I stopped after the second story arc.

The main reason I kept reading was that I was surprised by how simple the writing was. I don't understand Japanese very well (hence "I think"), but I know most N5 vocabulary and grammar, with some N4 vocab. There aren't too many words to look up in this, and the scenes are pretty self-explanatory. Aside from the words I would obviously have to look up, such as 強姦未遂, this is readily understandable and good reading practice. It's porn that a child wouldn't have too much trouble deciphering.

The art is OK, but unremarkable as far as broadly-released sexy manga goes. The censorship is basically white-out over half the page, lol.