Credits to Brolen for translation, Faytear for editing and me for decensoring.

Oh no, Madoka senpai eventually enjoyed being raped and seduced the guy to fuck her ass. I really hope that the author could later continue the story.
Thanks for sharing this great story.

Base +1, shuntensatsu +11, Feladrance +3, Friday13th +6

i think what happened is she wanted anal all along and hated the idea of vaginal sex.

Base +6, xxaimlessxx +12, jaylou1010 +7, Wrath of Anon +1, tomu-kun +6, Shinryu-Rex +6, Hakrei +26

I am no art expert, but there is something seriously wrong with the Tie physic of picture 18

Base +12, xxaimlessxx +12, jaylou1010 +7, robedob22 +4, tomu-kun +6, flashpanty +9, zinos6 +6, lwllw +7, Khanattila +6, Koreafan +4, JakeRowling +7, darkling13 +7, xchemistry +6, and 7 more...

It's also possible that the blackmail was just two fuck buddies engaging in some kinky roleplaying. Even when she was left in her own thoughts when he bound her and left for a bit, she wasn't so much angry as she was anticipating and afraid.

They don't seem familiar enough to be lovers, but neither of them ever spewed venomous words at the other and for someone "blackmailing" someone else, he was surprisingly polite about the whole thing even though he didn't have to be. Even she doesn't quite sound convinced by the front she's putting up, so I suspect that the entire scenario was consensual from start to finish, as opposed to "tease her until she likes it."

Blackmail or consensual roleplay. The lighthearted tone of the story makes either interpretation fine with me.

Base +6, xxaimlessxx +12, jaylou1010 +7, Toastkoro +8, zinos6 +6, astrohydra +5, darkling13 +7, shuntensatsu +11, Shinryu-Rex +6, Goofy1 +6, TheHazard +4, Porokichin66 +7, Washma Butt +5, and 3 more...

As far as I can tell, it looks like this story was never released in a Tankobon.

Base +6