That Summer, I NTR’d My Friend’s Girlfriend [Final] [MarunomiKobo]

July 2, 2026F95

The story begins near the end of summer vacation during the protagonists’ college years.
One day, the protagonist’s roommate brings his girlfriend back to their apartment.
He tells the protagonist that the two of them plan to move out in 20 days, right around the start of the new semester.
Until then, she’ll be staying at the apartment with them.
The once peaceful shared living arrangement gradually begins to change from that moment on…

Thread Updated: 2026-07-01

Release Date: 2026-03-14

Original Title: 夏休み、僕は友達の彼女をNTRした

Developer: MarunomiKobo DLsite – Steam

Translator: RickSensei – Ko-fi

Censored: Yes (Mosaics)

Version: Final

OS: Windows

Language: English (Fan Translation)

Store: DLSite

Genre:

2D Game, 2DCG, Animated, Censored, Japanese Game, Male Protagonist, Multiple Endings, Anal Sex, Big Ass, Big Tits, Cheating, Corruption, Groping, Handjob, Internal View, , Oral Sex, Sexual Harassment, Vaginal Sex, Point & Click

Installation:

1. Extract and run.

Developer Notes:

Gameplay

The game is played entirely with mouse controls.

Within a limited amount of time, players choose various actions to gradually deepen their relationship with the heroine.

You can interact with her through activities such as:

Playing minigames
Giving her gifts
Spending time with her

These actions increase your intimacy with the heroine. As your relationship grows closer, new events and interactions will gradually become available.

Features

Multi-Stage Relationship Progression

Develop your relationship through a variety of interactions, unlocking new events and activities as your bond deepens.

Diverse Interactions and Evolving Scenes

As the story progresses, additional interactions, scenes, and branching developments become available.

Fully Animated H-Scenes

All adult content in the game is presented with full animation.

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