A Slut by Her Side: Boyfriend to Sister ~How the Man who Stole my Girlfriend Turned me into his Slut~

[Summary]
Our protagonist, Kengo Sakuraba, is a college boy with a strong sense of morals. He finds out his girlfriend is being sexually harassed by one of their perverted professors, who swears he won’t lay a finger on him so long as Kengo agrees to act as her stand-in.

He’s forced to cross dress and have his ass toyed with as his professor drills into him how to act like a girly slut. While he’s resistant at first, over time he slowly awakens to joys of being fucked like a girl.

In a twist of events, it turns out the girlfriend he’s trying so hard to protect has already been stolen. It was all a conspiracy orchestrated by her and the professor to feminise our protagonist into a simpering slut!

By the time he realises the cruel truth, it’s already too late for him. He’s been turned into a girly slut, through and through, with no hope of going back. Realising he can’t return to living as an ordinary man, he decides to become his professor’s bitch alongside his girlfriend…


[Character Showcase]
Kengo Sakuraba
A university student with a strong sense of morals. He’s poor and works to pay for his own tuition, but his girlfriend Anri is the greatest love of his life.

Anri Morimura
Kengo’s girlfriend. A sweet and gentle girl, but harbours a dark past.

Hideo Ogata
A professor at Kengo’s university. He secretly enjoys turning his favourite students into pets for his own private use.


[Content and Themes]
• Forced cross dressing and anal training/anal sex.
• Feminisation and moral degeneration, right down to learning to speak and act like a submissive bitch.
• Attending class dressed as a girl and cumming with an anal vibrator.
• Sucking his professor off underneath his desk.
• Watching his girlfriend have sex while he’s tied up with a dildo in his ass.
• Being dressed up all pretty by his girlfriend so he can announce his girly defeat.
• Servicing his master alongside his girlfriend like a pair of bitches
…And more.

22 Base Images
417 Images Total
2 Afterword Pages
419 Pages Total