Yuria has always found the existence of the sales department's ace, Agatsuma, to be a thorn in her side. Despite always giving her all to be the top of the department, she loses to him every time. However, if she can successfully pull off this next venture, being the department's top salesgirl may no longer be a dream! With this aim in mind, she decides to do overtime right up until the last train, but encounters a fallen Agatsuma wearing an expression as though on the verge of death. He admits to being a vampire, and begs her to give him her blood. When she allows him a taste, Yuria's body grows hot, overwhelmed with arousal...