The Game Census
Saintess Eruna and the Lustful Book of Corruption ~Busty Sister's H Services~ cover art

Saintess Eruna and the Lustful Book of Corruption ~Busty Sister's H Services~

はちからビスケット · 072 Project · 2025-07-11

Steam

AdventureCasualIndieRPG

One day, the sealed book suddenly exuded light, and a powerful succubus invaded Eruna's body. To suppress the succubus in her body, she has to keep taking “love potions”... Can Eruna resist the effect of the love potion and protect her purity from the men and the succubus?

87%
positive of 134 reviews
Very Positive
steam rating
$7.79
steam price (US)

Health check

Quiet
  • · 6 reviews in the last 8 weeks (~1/week).
  • · Review velocity down 33% vs the prior 8 weeks.
  • · Current weekly pace is under 5% of the all-time peak week (70 reviews).
  • · Top 62% of 11,362 Adventure games in the census by review count.
Estimated sales: 2.7k–6.0k copies

Review-multiple estimate from 134 total reviews — how this is computed.

Current store prices

lowest across shops (ITAD)$9.99

Deal snapshots via CheapShark, refreshed daily.

All-time low: $7.79 at Steam (2026-08-10)via IsThereAnyDeal

12-month high $9.99 · on sale 11 of 22 observed days (census price snapshots)

Review momentum

PositiveNegative
646420252026Week of 2025-07-11: 64 positiveWeek of 2025-07-11: 6 negativeWeek of 2025-07-18: 2 positiveWeek of 2025-07-18: 1 negativeWeek of 2025-07-25: 2 positiveWeek of 2025-07-25: 1 negativeWeek of 2025-08-01: 2 positiveWeek of 2025-08-08: 1 negativeWeek of 2025-08-29: 1 positiveWeek of 2025-09-05: 1 negativeWeek of 2025-09-12: 1 positiveWeek of 2025-09-26: 1 positiveWeek of 2025-10-24: 1 negativeWeek of 2025-11-21: 1 positiveWeek of 2025-11-28: 1 negativeWeek of 2025-12-05: 1 positiveWeek of 2025-12-12: 1 positiveWeek of 2025-12-19: 1 negativeWeek of 2025-12-26: 1 negativeWeek of 2026-01-02: 1 negativeWeek of 2026-01-09: 2 positiveWeek of 2026-01-16: 1 positiveWeek of 2026-01-16: 1 negativeWeek of 2026-01-23: 1 positiveWeek of 2026-03-06: 1 positiveWeek of 2026-05-01: 1 positiveWeek of 2026-05-15: 1 negativeWeek of 2026-06-05: 1 negativeWeek of 2026-06-19: 1 positiveWeek of 2026-07-03: 1 positiveWeek of 2026-08-07: 1 positive
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Price history

$9.99$7.792025-07-112026-08-172025-07-11 — best price $8.992025-07-25 — best price $9.992025-09-22 — best price $7.992025-10-06 — best price $9.992025-11-03 — best price $7.992025-11-10 — best price $9.992025-12-10 — best price $7.992025-12-17 — best price $9.992025-12-18 — best price $7.992026-01-05 — best price $9.992026-01-19 — best price $7.992026-01-26 — best price $9.992026-03-09 — best price $7.992026-03-16 — best price $9.992026-03-19 — best price $7.992026-03-26 — best price $9.992026-04-27 — best price $7.992026-05-04 — best price $9.992026-06-08 — best price $7.992026-06-15 — best price $9.992026-06-25 — best price $7.992026-07-09 — best price $9.992026-08-10 — best price $7.792026-08-17 — best price $9.99
Lowest recorded price across tracked stores, per day (census snapshots).

Completion

9
achievements tracked
92.1%
earned "Unsealed"
78.8%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsSingle-playerSteam AchievementsSteam CloudFamily Sharing

4 supported languages: Japanese, English, Simplified Chinese, Traditional Chinese

Census log

Computed from census-recorded observations only — dates are observation dates.

Recent updates