Complex sentence: Seven years ago, Yuto Amakawa's parents died in a car accident, leaving him alone without a single relative, the only item left of his family being a strange and mysterious amulet given to him by his late grandmother.
Split into simpler sentences: Seven years ago, Yuto Amakawa's parents died in a car accident, leaving him alone without a single relative. The only item that was left of his family is a strange and mysterious amulet which was given to him by his late grandmother.