Shinozaki Himeno is not interested in dating anyone before she's ready to consider marriage. She believes that the last year of high school is too early for her. However, Murayama confessed to her and asked her out solely because a friend told him he should try love. He also proposed dating her for only one month. If Himeno rejects his proposal, he will ask someone else. Despite this, she begrudgingly accepts, beginning an unusual relationship with him.