On July 27th, university student Aoi Hinata, played by Miwa, experiences an accident. Upon regaining consciousness, she discovers she is in a classroom setting from a week prior to the incident. During this time, her childhood friend, Riku Hasegawa, portrayed by Kentaro Sakaguchi, confides in her, revealing, “I have a secret. I can reverse time.” Although Aoi and Riku have feelings for each other, they have never confessed them. They finally express their mutual affection and travel back to a year earlier, enjoying their time together as a couple. However, there is a significant mystery surrounding the time travel, and the date of July 27th is fast approaching.