Sisters: Last Day of Summer

Animated visual novel about a new family hiding a secret

Jellyfish · Published by JAST · Released Jun 3, 2024

Reviews: Very Positive; 84% of 437
Recent reviews: Not enough recent
Players: 1; daily peak, Oct 28, 2026
Steam Deck: Unsupported
Last update on Steam: 1 year ago; Jun 10, 2025
Minimum PC: 512MB; 8 GB RAM · 10 GB disk; Full requirements

What is Sisters: Last Day of Summer?

In this single-player visual novel, a boy wakes in an unfamiliar house and is welcomed by a mother and her two daughters. You read dialogue and follow their daily lives as he gets to know Akiko, Haruka, and Chika.

For you if...

+you enjoy romance stories with an element of mystery

Not for you if...

−you want choices that meaningfully change the story's outcome

What players say

84% of 437 reviews are positive

Players praise the animation and artwork, but complain that the story is incomplete without JAST's free adult-content patch. Reports of crashes are mixed, with some later reviewers reporting fixes and others still describing crashes.

Screenshots and trailer

Sisters: Last Day of Summer screenshot 1

Sisters: Last Day of Summer system requirements

Minimum: 512MB, 8 GB RAM, 10 GB of disk space.

As published by the developer.

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Minimum

OS: Windows 10
Processor: Core i5
Graphics: 512MB
Memory: 8 GB RAM
Storage: 10 GB available space
DirectX: Version 9.0
Notes: SSD Required

Does Sisters: Last Day of Summer have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does Sisters: Last Day of Summer run on Steam Deck?

Unsupported No: Valve rates it Unsupported on Steam Deck.

Not supported on SteamOS

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows
Steam features: Cloud saves, Family Sharing
Languages: Text only: English, Simplified Chinese, Traditional Chinese.

Does Sisters: Last Day of Summer use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam