
A night at your best friend’s house turns into a tempting choice between desire and restraint.
Modeled estimate, not a reported figure. How we estimate →
Media

About
What happens when a spark ignites where it absolutely shouldn't? My Best Friend's Sister is a sizzling visual novel that pulls you into a whirlwind of temptation, secret desires, and choices that will echo through your life.
It all starts with a typical night out—you, your best friend, and his rowdy crew, drowning in drinks and sharing raunchy stories that would make anyone blush. But the real story begins after the last call. Crashing at your friend's place for the night, you come face-to-face with the one person who won't let you sleep: his younger sister.
She's sharp, playful, and impossibly alluring. And tonight, her gaze is full of unspoken promises, her words laced with a daring invitation. She's clearly playing a game, and you're her intended target.
The Choice is Yours:
Give in to Temptation? Engage in her dangerous flirtation and risk a night of passion that could shatter your most important friendship.
Take the High Road? Stay loyal to your friend and try to forget this charged encounter, always wondering "what if..."
Every decision you make shapes your relationships, unlocking new scenes, dialogue, and endings. Will you resist? Or will you let desire take control?
🔥 A Compelling Story with Spicy Twists
Dive into a narrative where every night holds new secrets, and every choice leads to unexpected consequences. A simple sleepover turns into a high-stakes game of seduction and loyalty.
🎨 Stunning, High-Quality Artwork
Immerse yourself in a beautifully crafted world. Featuring exquisitely illustrated characters and scenes, every location—from the noisy bar to the intimate bedroom—is rendered with stunning detail to pull you into the story.
💘 Smooth, Animated Intimate Scenes
Experience the heat of the moment with fluid and immersive adult animations that bring the passion and intensity of the story to life.
🍻 Guy's Night Out & Raunchy Bar Tales
Become one of the guys as you listen to their provocative and uncensored stories of romantic escapades and misadventures. These tales aren't just for laughs—they might even teach you a thing or two.
✨ Meaningful Choice-Driven Gameplay
This isn't about simple right or wrong answers. Your seemingly small decisions dynamically alter your relationships and directly lead to multiple endings. Replay to discover every possible outcome!
Genres
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English*, French, Italian, German, Spanish - Spain, Spanish - Latin America, Traditional Chinese, Simplified Chinese, Korean, Dutch, Polish, Portuguese - Brazil +4 more
Engagement
Hours played at review time, across 41 reviews with recorded playtime.
Reviews
Themes across 41 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
positive critical· bar length = how often the theme comes up
Reviews
Had some potential, but simply too short (only a half hour to complete), especially at the full price. Most of the sexy encounters are a series of flashbacks from co-workers regaling the MC with tales of their alleged exploits, not even with you as the protagonist. In the (very limited) story, you already have a sexual history with the unnamed sister, so there's not even any excitement about developing a new kind of relationship with her or tension in finally crossing a forbidden line. If you get it on deep discount, it might be worth it if you want an easy 100% Achievements game, to garner profile XP with the badge, and get gems from the Shop items. (Any additional play time is me leaving it on in the background for more card drops.) Even after getting it on sale, I'm debating whether I want to keep it for those reasons or to request a refund. To be fair, the renders are good, the various women are appealing, and there is competent voice acting. If there was just a little more to the game, I probably would have considered a favorable rating. Too bad.
The video preview contain about 75% of the game, if you can call it that.
The characters have great chemistry and believable interactions. Very believable.
It's a paid demo not a full game. There's some good ideas in here but again, its basically a demo of an unfinished product that is likely already abandoned. Play the 30 minutes of content and refund it.
very short, less than 15 min play though. do not recommend. update requested a refund and pending response.
интересная игра с развернутым сюжетом приятной графикой и минимальными требованиями
Less than 1/2 hour of game play.
美术做得很好,但是太短了。只是几个迷你故事合集,可以称得上虚假宣传,没有任何情节可言
Гайд как стать самым счастливым человеком на свете ценой потери лучшего друга 😂
The choices are hard. Not because they're morally complex, but because every option somehow leads to chaos.
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Trends
Concurrent players on Steam, sampled daily since tracking started.
Audience
Estimated from the language of this game's reviews — a proxy for where players are, not official Steam demographics.
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