Oneshota Swordplay ACT: Hagokoro ^1.06

2DCG, 2D game, Shota, Male protagonist, Animated Scenes, Revers Rape, Harem, Big sisters/Older Girls, Brutal/Ryona, Humiliation, Violation, Multiple Endings, Censored, Japanese game

Majority of the Japanese PC games & indie games will cause game-breaking bugs & glitches on non-Japanese local PCs.

ether
A-change both your format & local hit Start>control panel>region setting to Japanese (you can change it back any time once you're done)

or

B-install Locale Emulator , using Locale Emulate, right-button-mouse click on Game.exe and select Locale Emulator>Run in Japanese
[keep in mind, not all Japanese games will work with this emulator method, since most of the time the game engine itself is written in Japanese & the emulator will not be able to read it from the game.exe].

For more in depth guide, check this link.