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Takumi, a man who is unpopular with women and hasn’t had a girlfriend for 23 years, happens to walk into a café one day and falls in love at first sight with Erica, a waitress. However, she is suffering from domestic violence from her boyfriend, Ryo. Takumi tries to help her, but their relationship becomes entangled with the presence of Takumi's sister, Yuka, a waitress at the café where he works part-time, and Ryo's brother, Toru.