Those who have seen movies like 500 days of summer and inception + source code, can actually understand that the story is what you want. The story manipulate by saying "parallel universe" but in actual the references hold strong point that either Main Character is dead or in Coma PAY attention to the girl's appartment , the door was totally off from everything. And the death could be at train or the Car accidnt I think its the Train because the after story has charater telling that he didnt save her n its actually death of character and its the two suns showing the HELL kinda situation for Hero