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

Synopsis

After helping a woman who fainted on the street, I discovered that her daughters are the popular and beautiful twin girls in my class — Yuzuki and Haruka Kotobuki! Before I knew it, both of them seem to have developed feelings for me…? A sweet school harem romantic comedy with two unattainable beauties begins with a simple act of kindness! (Source: Comic Growl, translated)