Hogwarts Harem [v1.1a] [Koister Games]

February 28, 2026F95

You’ve been invited to teach an exclusive 18+ summer program at Hogwarts! Four talented witches under your supervision, each with their own charms, flaws, and secrets. Your task? Guide them through study, discipline, and discovery… while navigating the temptations that come with close mentorship.

Thread Updated: 2026-02-28

Release Date: 2026-02-21

Developer: Koister Games Patreon – Discord

Censored: No

Version: 1.1a

OS: Windows, Android

Language: English

Store: Itch.io

Genre:

AI CG,, Adventure, Monster, Male Protagonist, Fantasy, Lesbian, Bdsm, Masturbation, Anal Sex, Futa/Trans, Handjob, Male Domination, Masturbation, Oral Sex, Sex Toys, Spanking, Virgin, Group sex, AI CG, Milf, Groping, Parody, Voyeurism, Tentacles

Installation:

1. Extract and run.

Changelog:

v1.1a
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.

v1.0

Initial Release