Taoreta Fujin wo Sukutta go Houbi wa, Musume no Bijin Futago to no Otsukiai Deshita.

After helping a woman collapse on the street, the man discovers she is the mother of Yuzuki and Haruka, two beautiful twin sisters admired by their classmates. Yuzuki is composed and mature, yet occasionally makes bold statements, while Haruka is cheerful and innocent but lacks personal boundaries. He becomes involved with the twins in a romantic relationship that includes alternating dates and public displays of affection at school. The three also spend time together on Christmas. The story follows this dynamic as a school-based romantic comedy.