Sisters: Last Day of Summer

Jellyfish · 2024 · $24.99 · Adventure · deal grade B

Measured on 2026-10-05 16:19 UTC. The whole catalog is re-measured daily; a game that just launched can move fast between passes.

• Estimated net residual revenue: $670 to $1.0k per month
• Opportunity: $1.6k per month at x1.85 dormancy
• Estimated lifetime owners: 16.4k
• 85% positive across 447 reviews · 4.6 reviews/month

Why it's flagged

• Developer silent for 16 months
• Studio quiet across its whole catalog
• Store page localized in only 3 language(s)
• No Steam discount in 4.0 years (deepest tracked: -0%)

Analyst notes (AI-assisted)

Note written 2026-08-25; the live figures above take precedence over any numbers in it.

A 4-5 hour visual novel from JAST USA about a mysterious summer's end, styled with anime-quality production values.

Sisters: Last Day of Summer is a quiet, niche visual novel with strong community sentiment (85% positive, majority still engaged) and steady residual revenue ($669/mo mid-range) despite zero promotional activity in 48 months and minimal developer visibility. The title carries JAST's publishing weight and Korean-Chinese language skew suggests untapped regional distribution potential, but the eroge category, single static ending, and publisher's fading studio status create structural headwinds. Best suited for a publishing partner or IP holder seeking catalog depth in the adult VN segment rather than a revival play. Most realistic play: publishing.

• Risk: Eroge and visual novel category faces regulatory and payment-processor friction in Western markets; regional sensitivity in some territories.
• Risk: No achievements, trading cards, or workshop support limits engagement hooks; cloud save alone is minimal stickiness.
• Risk: Zero promotions in 48 months and no developer posts in 14.5 months suggests JAST may be in quiet maintenance mode; successor titles or studio wind-down risk.

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