Caution:This is only a patch(dlc) of the game. You need to put it to the game path after downloading it.
katfile for dlc: https://katfile.com/j41nripsw2jk/魔法聖女_姫騎士カノン_くっ殺せ!_触手まみれの巨乳変身美少女戦士_拡張KIT版VJ011446.zip.html
Additional:For convenience, I'll provided an alternative download link where the additional DLC has already been integrated into the game. It should be ready to run directly after unpacking. (Note: This game requires the resolution to be set to 1280×768 in order to run on Windows 10.)You need to download both two links followed and put them together so that you can unpack.
katfile for whole game:(two files together should be about 3.71GB, check it after downloading) part 01:https://katfile.com/6c6qjufiyumf/魔法聖女_姫騎士カノン(拡張KIT_added).z01.html part 02:https://katfile.com/1k42wk67o45o/魔法聖女_姫騎士カノン(拡張KIT_added).zip.html