WATASHI DAKE GA MIYAJI MIYUKI WO AISHITEIRU

Miyaji Miyuki (16) had told various girls in elementary school that she would marry them when she grew up. But then she transferred away to a different school. A few years later, she returns to her hometown to start high school, where she is reunited with three girls she had proposed to marry way back when... (Source: Storia, translated) — Description from AniList community (anilist.co).