Official Website:
Getchu: https://www.getchu.com/soft.phtml?id=19087
VNDB: https://vndb.org/v2814
Japanese Title: ガンシスター
Romanji: Gunsister
Release Date: 2002/11/29
Developer: Silver Co., Ltd.
Size: 786.8 MB
https://alfafile.net/file/A8oaT/Gunsister.part1.rar
https://alfafile.net/file/A8oaD/Gunsister.part2.rar