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Open At Nine

Adult Only · 18+

Open At Nine

“Massive debt, a shabby brothel, and a naughty succubus… This is all I get for defeating the Demon God?!” Hire monster girls to attract customers and pay off your debts! Don't forget to give your girls lots of hands-on job training!

Released Apr 12, 2023 Developer Black Cat Entertainment Publisher Mango Party, Mango Party News Platforms Windows
View on Steam ↗ $4.99 (US · as of 2026-09-26)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-26.

81.1%positive631 reviews
Recommended · 1 found this helpful

“Very good economy based H Game about running a brothel. 6-8 hours if you read 3-5 if you don't. 8/10 It's a great game. Pros: Very good 2D animated 90% Consensual H Scenes. Standard H Gallery. H Scenes on win. Solid VO. Great position variety. Solid economy and matching puzzle H…”

— a player, Steam review · 10 hrs played
Recommended · 0 found this helpful

“thumbs up”

— a player, Steam review · 11 hrs played
Not recommended · 0 found this helpful

“I really enjoy the artwork, but the gameplay is repetitive and not very fun. It might interest you if you're into resource management games (not exactly the same, but similar mechanisms).”

— a player, Steam review · 5 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. History through 2026-08 via SteamCharts; self-collected from the Steam API since Aug 2026.

389all-time peak
0 100 200 2024 2025 2026 130 avg · Apr 2023

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-26.

17achievements
43.2%median completion
12.0%rarest: Well-trained Crew
97.2% of players 92.0% of players 92.0% of players 63.5% of players 62.4% of players 58.3% of players 46.0% of players 43.3% of players 43.2% of players 40.6% of players 39.0% of players 34.0% of players 31.3% of players 15.1% of players 15.0% of players 14.7% of players 12.0% of players 97.2% 0% most earned rarest
Almost everyone has
97.2%First Pot of Gold — Open your business for the first time
92.0%Fresh Blood — Sign a contract for the first time
92.0%Expand Business — Add a room for the first time
Rarest badges of honor
12.0%Well-trained Crew — Reach max level on all Monster Girls
14.7%The Kingdom's Richest Man — Earn a total of 80000 coins
15.0%Head Will Roll — Failed to repay your debt

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Dec 26, 2025
Unity Security Update

Fix: At business result view, pressing enter multiple times will keep increasing round/day

Sep 30, 2024
Patch0930

Fix: Unable to properly save Autosave and manual saves when saving the game.

Sep 25, 2024
Patch0925

Fix: Unable to proceed with the game when failing to read the save path.

Jul 25, 2024
Taiwan Love Story⁵ - An Unforgettable Journey of Romance with Five Charming ladies!

https://clan.akamai.steamstatic.com/images/41075428/4d862846242671374e653cc464a95ab2a9b27633.gif About Game Taiwan Love Story⁵ is an interactive romance novel. While studying abroad, you attend a coha

Jul 12, 2024
NTR Office - Defend your love or choose to be cuckolded, it's all up to you!

https://clan.akamai.steamstatic.com/images/41075428/3e6cebf2d0ef4491e9d70e2a351bab4b4e5fa5c2.gif About Game You work at a poorly managed pharmaceutical company, where your girlfriend is your team lead

Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-09-26.

GenresCasual, Simulation
FeaturesSingle-player · Steam Achievements · Steam Cloud · Family Sharing
LanguagesEnglish, Traditional Chinese, Japanese * , Simplified Chinese *
Achievements17
Minimum system requirements (PC)

Minimum: OS *: Windows 7+ Processor: Core 2+ Memory: 2 GB RAM Graphics: HD620 DirectX: Version 9.0