Exorcism sister! - seduce your little brother -

* One day, the little brother is possessed by a sex demon.
Our hero, Shinonome Kei, is possessed by a sex demon named Ink. A depraved kind of illness befalls him! If he is to be saved, he must have sex until he ejaculates. Ink's target is Kei's elder sister, Otoka. She coerces Otoka to seduce and have sex with her little brother in order to save his life.
"I'm sorry, sis......."
"It's okay, let's have sex......"

* Forced temptation of the little brother!
The basic formula of this game is sex while clothed, mainly in a shrine maiden outfit and school uniform. Though the elder sister is a powerful exorcist feared by many an evil spirit, she blushes as she is forced to seduce her little brother. But the sex demon isn't satisfied with just sex! The older sister is on the verge of rage as she is forced into the most thorough forms of seduction.
But she desperately continues having sex with her brother in order to satisfy his ravenous lust.
"Ugh..... You'll pay for this....."
"What are you doing!? Don't you care what happens to Kei?"

* The dreadful symptoms of the depraved illness!
The little brother now ejaculates an enormous amount of semen, and he does so repeatedly inside of, and all over his sister.
The sister's strong pride eventually gives way under the unrelenting series of intense orgasms!

* Depraved illness system!
Occasionally, the little brother has fits of the depraved illness.
In the classroom, the school infirmary, the music room, and even on the sacred grounds of a Shinto shrine.
His sister engages in sexual activities rich with allure, in situations where people might be watching.

* Cast
Sononome Otoka: Kashiwagi Haruno
Ink: Umezato Miio

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http://www.lilith-soft.com/lilith/product23.html