![Gal Big Sister Z [v1.0] [POISON]](https://f95zone.to.it/wp-content/uploads/2026/10/6579057_134849.avif)
Gal Big Sister Z [v1.0] [POISON]
Those bitch sisters who look down on me… just you wait.
The protagonist, Niihara Daiki, has been used as a personal errand boy by his domineering sisters ever since he was little.
Whenever Daiki is home, he handles all the chores.
The moment he tries to protest, they start hitting him and unilaterally cast him as the bad guy. This is his daily life.
Fed up with this routine, Daiki one day hears about a hypnosis device from an upperclassman at his university. He tries it half in disbelief, but the effect is immediate – his sisters become obedient to his every command.
Hahaha, this is amazing! Those sisters of mine, doing whatever I say!
And so he begins using the hypnosis device, behaving at home as if to vent all his pent-up resentment – but…
Thread Updated: 2026-10-09
Release Date: 2026-08-27
Original Name: ギャル姉Z ～ガチ気持ちイイ！！アタシたちがアンタの肉オナホになってやる！！～
Aliases: Gyaru Ane Z ~Gachi Kimochiii!! Atashi-tachi ga Anta no Niku Onaho ni Natte Yaru!!~
Censored: Yes (Mosaics)
Version: 1.0
OS: Windows
Language: English, Chinese, Japanese
Voice: Japanese
Length: Medium (~10 hours)
VNDB: Link
Other Games:
Genre:
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2dcg, Japanese Game, Male Protagonist, Big Tits, Big Ass, Incest, Harem, Cosplay, Pregnancy, Titfuck, Masturbation, Anal Sex, Vaginal Sex, Creampie, BDSM, Lactation, Handjob, Scat, Urination, Group Sex, Sex Toys, Mind Control, Voiced, Censored
Installation:
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1. Extract and run.
Developer Notes:
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◆Notice◆
All in-game text has been machine translated.
◆Story◆
One day, Taiki finds himself living under the same roof as two older women.
They look down on him, dump all the chores on him, and treat him like their personal errand boy.
"How long is this going to go on…?"
Nursing his frustration in silence, Taiki one day hears a strange rumor.
— That there exists a device capable of influencing a person’s consciousness and "tuning" their behavior.
When he gets his hands on one through a shady mail-order site and puts it to the test, his quiet everyday life changes completely.
Hidden instincts beneath a tough exterior, an overprotective maternal side, and a terrifyingly sharp business sense—
The true selves the two women had kept buried deep inside begin to surface, one by one.
And in that moment, humiliation begins to give way to a sweet, dangerous reversal of control.
◆Game Features◆
・Click-through visual novel
・Fully voiced heroines
・CG Gallery
※Japanese voice acting included (※Male characters not voiced)
◆Content Warning◆
This game contains content that may not be appropriate for all ages and may not be suitable for viewing in a workplace.
