Info:
https://www.bootup.jp/products/hahamusu_ss/index.html
https://www.getchu.com/soft.phtml?id=1244923
File Size: ~3GB
https://alfafile.net/file/AzS6b/Hahamusu_Gaiden.part1.rar
https://alfafile.net/file/AzS67/Hahamusu_Gaiden.part2.rar
https://alfafile.net/file/AzS6s/Hahamusu_Gaiden.part3.rar
https://alfafile.net/file/AzS6P/Hahamusu_Gaiden.part4.rar