Developer: os-shiki
Publisher: os-shiki
Release date: Nov/26/2025
Version: Final
Language: English (Official)
Censored: Yes (Mosaics)

showing off sex
※While costume changes via 2D motion are possible in-game, they will not be reflected in the video footage.
(Even if the character is in a nude state, the video will play with clothing on.) This is not a bug, but an intentional feature.

※The audio in this work consists primarily of moans and does not contain dialogue.

※This work was translated by the creator using machine translation.
There may be differences compared to native-level nuance.

※The demo version includes only “Foreplay Battle” and “Foreplay Simulation.”

The wife of a senior colleague at the company.
She has a quiet personality.
She has a very good figure.

She ends up watching her husband have sex with the protagonist.

Sex Battle + Sex Simulation & Multiple Endings

[Game System]
■Battle■
Turn-based battles featuring show-off sex

■Enhancement■
Enhance the protagonist's parameters

■Simulation Mode■
Unlock Simulation Mode by winning battles.
Freely engage in sex to earn points.

■Episodes■
Choices within episodes branch the ending (can be replayed multiple times)

■Binding Conditions■
Unlockable with points. Applies constraints to heroines (e.g., forbidding condom use) rather than items. Affects ending.
Appearance of creampie button and fertilization probability fluctuate.

■Gallery■
Illustrations are added to the gallery upon winning battles or fulfilling clear conditions.

2D Motion Animation

[Animation]
Composed of 2D motion animation and video.
Animates 13 original sex illustrations.

Simulation mode includes an “Auto function,”
allowing hands-free viewing.

Endings by Condition
Show off [os-shiki]
Unlocking episode choices and restrictions
will alter the “Mina NTR Level” and “Senpai Breakdown Level” parameters.

Endings change based on whether “fertilization occurs” or other conditions are met.

Retries are possible, and hints for conditions are provided in the in-game instructions.

Sensitivity level and enemy HP level
Show off [os-shiki]
Depending on sensitivity levels and enemy HP levels,
special buttons like splashing or spraying become usable,
and corresponding dialogue (text) and images change.

Show off plenty to break down your senior.