You can find English and international subtitles for this exact release on the following sites:
Sector 7 (2011) English Subtitles - SUBDL subtitle Sector.7.2011.DVDRip.x264.AC3-Zoo
Webdl. Sector 7 2011 HDRip 720p 600MB Ganool. (aku2793) Sector.7.2011.720p.HDRip.x264.AC3-ZERO. (Zash) Sector.7.2011.720p.HDRip. ( Uncertainty.2009.DVDRip.x264.AC3-Zoo You can find English and international subtitles for
: The original film is in Korean ; subtitles are necessary for non-Korean speakers to understand the "deep content" and dialogue. subtitle Sector.7.2011.DVDRip.x264.AC3-Zoo