You have to buy the game and expansions separately. HF Patch does not contain the full game, paid expansions or any other pirated content. Honey Select 2 can be split into two parts: character and scene creation tools (character maker and Studio), and a simple 'pick and play' game (it can use your custom characters, but not scenes). All content is tested and fixed (or removed) as needed before each update, providing a stable platform for further modding.
It will allow you to load all character cards and scenes and give you countless content creation and gameplay improvements while still keeping the original, uncluttered feel of the game. It also fixes many common issues with the game. An unofficial patch for HS2 that installs the latest fan-made English translations and essential mods.