Rina Otoumi and Shiori Kuraki are former lovers. One day, when Rina's current boyfriend, who she lives with, returns to his hometown, he suddenly gets a call from his ex-girlfriend Kuraki. Although they are Kokoro to meet again after a long time, the two feel very awkward at Rina's house. Meanwhile, Rina starts asking, "Do you want to stay over?" After an unintentional French kiss, they get out of control, fingering each other from morning until night, licking each other's cunnilingus, and fucking like crazy for three days while taking pictures of each other naked on their smartphones...!