Rewind

a boy named Himari Yuki and his sister Yui Yuki twins born in 2048 had a normal life growing up in Tokyo, going to school being normal kids although they lived alone since thirteen, because their parents are working oversea's to avoid the overworking problem in Japan. The normal life they enjoyed so much will soon come to an end on the date of 2065 on March 13th their shared birthday on the date their mother and father visit every year. also the day Himari learns his power cant stop the strings of fate.

Names translation:
Himari = Ball of Light
Yui = Conclusion
Yuki = Snow