The ghost of Kawashita-san, a senior at the university's film club who committed suicide one year ago, suddenly appears in front of Shingo, an aspiring filmmaker. As per Kawashita-san, he came back because he wanted to have sex with Aoi-chan, a junior student whom he had a secret crush on her when he was in university. In order to fulfill his desire to have sex with Aoi-chan, Kawashita-san and Shingo will travel back in time on that day when they were in university, which was probably the only chance for Kawashita-san to have sex with Aoi-chan. They meet Aoi-chan in her younger days. Can Kawashita-san redo the past and sleep with Aoi-chan, his long-cherished desire? A funny but a bit painful time-travel love story begins.