Until the Defiant Stepsister Falls (v1.0.0) by Karaage Kompany

About the game

Through his parents' remarriage, the protagonist has gained a new stepsister. Leaving the two of them behind, their parents set off on their honeymoon.
The protagonist, who loves little-sister stories, sees this as his chance and wants to somehow build a good relationship with his stepsister.
However, she is strong-willed and openly hostile toward him. But right now, the two of them are alone in the house… Whatever happens, it won't be a problem as long as he keeps it under control. The protagonist resolves to start a sexual relationship with his stepsister by any means necessary. Even if that means as lovers, or as his cum dump…

Last update: 2026-10-20
Released: 2025-11-23
Original Name: 反抗的な義妹(きみ)が堕ちるまで
Aliases: Hankouteki na Gimai (Kimi) ga Ochiru made
Creator (developer): Karaage Kompany
Translator:
Censored: Yes (Mosaics)
Version: 1.0.0
OS: Windows
Language: English ( & )
Voice: Japanese
Store:
Other Games:
Genre:

2D CG, Censored, Japanese Game, Male Protagonist, Voiced, Ahegao, Creampie, Corruption, Groping, Male Domination, Internal View, Oral Sex, Vaginal Sex, Big Tits, Simulator, Management, Romance, Sleep Sex, Teasing, Incest

How to install:

1. Extract and run.

Developer Notes:

○Main System
- You can talk to your stepsister by having a conversation.
Her affection level can be increased up to three times a day, and her reactions will change depending on the level of affection.
Also, if you touch her chest...
- The daily cycle changes from Monday to Friday to Saturday and Sunday.
On weekdays, the day starts at 6pm. On Saturdays and Sundays, it starts at 10am.
If you rest, you can advance the time to 1pm/6pm/the next day.
Events basically occur when you advance to the next day.
- You can earn money by working part-time.
The amount of money you earn varies depending on the action points you spend and the protagonist's status.
The money you earn can be used in the shop to make purchases.
- The shop has items necessary for the story and items that will help you progress quickly.
- Items you can purchase (some)
★ Key Tool If you purchase it, an event will occur the next day. If no event occurs the next day,
touching (nighttime) will occur.
★ Aphrodisiac If used, the experience points gained from touching etc. will increase.
★ Sleeping pill If used, the time you can touch will be extended.
★Workout book: Using this will increase the protagonist's strength points.
★Donut: Using this will slightly increase the heroine's affection level.
〇 Touch-based game system
There are two types of touching: bath time and nighttime sex. The session ends when time runs out or when ejaculation occurs.
〇Partial list of touching content:
breast massage, nipple play, fingering, cunnilingus (nighttime sex only), penetration (nighttime sex only), etc.