Download all files, then split and join all the files with the same name and diferent ext. 001.001 - 001.002 - 001-003 - 001.004. When all files are join in 001 you can open that file with winrar and extract all videos
Saimin Ryoujoku Gakuen 1-2 Subtitles English
Saimin Ryoujoku Gakuen 3 RAW