Time and Space in Bloodshed

One regret gave rise to six cycles of reincarnation, and seven versions of me. Now, at this final chance, the seven of us stand at the end, looking back at the beginning where they first met. There was a road lined with rapeseed flowers, an off-road vehicle, and four strangers. That was when we first met. It was also my seventh time going to meet them, and the last. This time, not one of them can be left behind!