ok, so after install TWRP recovery, i need a clean install b4 flashing so i tick all the selection including the "system" and "data" just for a clean wipe. after finish wipe, i was like      "SHIET" my black pearl rom is inside the data. 1st semi-brick attempt. stuck at LG logo with blinking LED. luckily i found some help from XDA that i can still push the rom from TWRP via adb. bt it takes quiet a lot of times and efford to search, trail and error. my last resort was to flash back to factoy. but it takes times to download for the original LG G2 stock rom. so i try my best to search for easiest way while waiting for download, thank god i found it.