Hogwarts Harem
by Koister Games
Game Details
- Version
- v1.1a
- Developer
- Koister Games
- Engine
- Unity
- Status
- Ongoing
- Language
- English
- Censored
- No
- Updated
- 27 February 2026
About
You're brought in to run an exclusive 18+ summer program at Hogwarts, put in charge of four witches with their own personalities, weaknesses, and secrets to work through. The framing is straightforward mentor-and-student, but the "study and discipline" part is doing a lot of heavy lifting.
Your job is to supervise their education while the line between teaching and temptation keeps getting thinner. Each witch comes with her own arc to work through as you decide how far the mentorship goes.
Day to day, you split time between structured lessons and the private moments that grow out of them, steering discipline into discovery at your own pace. Hermione Granger later joins as a Teacher's Assistant with her own storyline, giving you extra tools for how the program is run, though the core loop of supervising, studying, and slowly losing boundaries stays the same.
Changelog
- 322 New Renders!
- 258 brand-new renders added (More than the total number of renders in v1.0)
- 64 existing renders re-made and improved! (Over 30% of v1.0 renders!)
- Hermione Granger Arrives!
- Hermione joins the summer program as your Teacher’s Assistant, complete with her own storyline. She gives you more control and tools in how you educate your students.
- Night Time Fun!
- After completing a character’s story, you can now invite them back to your bedroom at night, with multiple activities to choose from.
- A New Weekend Location!
- Visit the Black Lake on weekends to discover new scenes with familiar characters, plus a new unique character.
- That's Not All!
- Numerous new discoverable scenes have been added around the castle.
- Utilize a new magical detention punishment option.
- A "Win Screen" has been added to clarify when the player has discovered all available content.
- Cheat Codes (Patron perk): Use Incants in Hogsmeade on weekends to modify the game or unlock bonus renders.
- An assortment of small tweaks and fixes to improve the game experience and performance.
- Initial Release
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