After breaking up with her long-term boyfriend, Hikariha started drinking alone at her usual bar. One day, she hit it off with a mysterious man named Haru who appeared at the bar and had a one-night stand on a whim. They continue to have a friends-with-benefits relationship, but she seems to be falling for his dangerous charm and can't seem to cut ties... Before things go any further, she unilaterally cuts off contact, but...! Sayaka Nanjou