Kirishima Gakuen Seitokai Shikkou-bu

This young adult story is set in the student council of an all-girls school, where the girls work for "freedom and hope." Hiyori Ugaki, a first-year junior high school student, is troubled by a strange man who gets involved with her on the morning train. Hiyori is supposed to like school, but recently she has been feeling uneasy about leaving her house. When she puts her concerns in the student council's suggestion box, an unexpected person helps her out...

(Source: Natalie.mu, translated)
https://comic.k-manga.jp/title/232330/pv