Nejimaki Kiriko

Kiriko falls in love with Futahishi Kiseki, a boy who works at the large mansion she lives in. They share a wonderful time together, but somehow their encounter triggers the world's end. Suddenly, Kiriko finds herself back in time, back to the moment Kiseki first visited the mansion. With the ability to rewind time on her side, will Kiriko be able to save both the world and her love?