若葉さんちの青い恋

The four Wakaba sisters—eldest Koharu, second daughter Manatsu, third daughter Akira, and youngest Chifuyu—are all experiencing their first love simultaneously. Koharu, a university student, has feelings for a senior colleague at her part-time job. Manatsu is drawn to a boy in her archery club who shares her interests. Akira harbors a crush on a classmate in her school club. Chifuyu likes a boy in her class. The close-knit sisters frequently gather to discuss their romantic dilemmas and share advice on how to express their feelings. (Unreviewed summary by Grok 4.1)