Summer Sisters

Okeyutei · 2026 · $9.99 · Casual · deal grade B

Measured on 2026-09-29 16:17 UTC, 6 days ago. The whole catalog is re-measured daily; a game that just launched can move fast between passes.

• Estimated net residual revenue: $265 to $398 per month
• Opportunity: $530 per month at x1.60 dormancy
• Estimated lifetime owners: 3.6k
• 70% positive across 138 reviews · 4.0 reviews/month

Why it's flagged

• No developer announcement on record, ever
• Store page localized in only 3 language(s)
• Last discounted 0 months ago, 2 sales in the last 12 months

Analyst notes (AI-assisted)

Note written 2026-08-22; the live figures above take precedence over any numbers in it.

A 2026 visual novel about reconnecting with family over summer, published by Kagura Games with explicit adult content.

Summer Sisters generates $2,255/mo residual revenue on a $9,004 lifetime base, placing it in the quiet-but-profitable tier for adult-oriented visual novels. The 73% positive sentiment, strong Chinese-language penetration (40 reviews), and 20% active player base suggest genuine engagement despite minimal marketing footprint (1 discount in 12 months, no dev posts). The title is not acquisition-viable due to Kagura Games' full ownership and publisher lock-in, but represents a case study in how niche adult VN fare performs at scale on Steam without ongoing investment. Most relevant to publishers evaluating portfolio depth in the visual-novel category and evaluating market expectations for mature-rated casual releases. Most realistic play: watch.

• Risk: Adult visual-novel category carries platform curation and payment-processor volatility risk; Kagura's status as primary outlet for such titles on Steam is structural, not durable.
• Risk: 80% free-copy ratio and 35.9% key-share penetration signal heavy grey-market seeding; organic discoverability may be inflated by non-purchase traffic.
• Risk: No achievements, trading cards, or workshop support limits stickiness and viral coefficient typical of casual genres; median session is 1.7 hours.

This case as Markdown · Estimates carry ±30-50% error per title.