Developer: Maguro Coffee
Publisher: Maguro Coffee
Release date: May/30/2026
Version: Final
Language: Japanese (Official)
Censored: Yes (Mosaics)

Title / タイトル: 相克のアルテール
Brand / ブランド: まぐろ珈琲
Release / 販売日: 2026/05/30

This game is a cuckolding RPG centered around the protagonist, Stello, and his wife, Alter, who has fallen into slavery.
The game features 28 basic CGs and a total of 37 H-scenes.
The H-scenes primarily focus on Alter's actions with the cuckolder, with scenes viewed from both Stello's and Alter's perspectives.
In addition, there are defeat-based erotic scenes involving sub-characters and mob characters.
Main situations include:
- Fellatio, titjob, bondage, breast milk squirting, pregnant sex,
- Shadow puppet sex through a curtain, bunny girl sexual harassment at a casino, striptease in a slum,
- Defeat-based erotic scenes of sub-characters and mob characters, etc.
- Looping audio (BGV) is included in the H-scenes.
This can be turned off in the settings.