She has never been in love and has no desire to get married. However, after her mother's hospitalization, she began to ask herself about her future life and decided to start marriage activity. Although she has never been in love, she believes that marriage is possible without love... Based on various data and information, she enters the marriage activity market, but the world of marriage activity is not so easy! Matching apps, marriage activity parties......Kohaku is faced with various problems related to marriage activity as she uses various services. What will happen to her marriage activity?