Class no Bocchi Gyaru wo Omochikaeri Shite Seisokei Bijin ni Shiteyatta Hanashi

Story

On a rainy night, Akira Akamori, a high school boy about to transfer to a new school, sees his blonde-haired classmate, Aoi Sotome, standing in the park drenched from the rain. “…I don’t have a home anymore.” Though he doesn't know Aoi well at all, Akira couldn’t leave a girl alone in the rain, so he took her home. “Thanks for the help.” “Y- You're welcome…” When Akira hears about Aoi’s complicated situation, he decides to help her and let her live with him until he transfers to his new school.

Synopsis via AniList (English).