Nakanmon! Manga

Nakanmon! summary:

Hirahara Tsukasa just moved to Tokyo from Hiroshima, and she's late on her first day of school because she misses the bus. But this leads to a chance encounter with four other people in her class, and somehow, the five of them became friends? Crybaby Tsukasa, the sharp-tongued yet soft-hearted Himeno, the understanding Ichihara, as well as Agatsuma and Onda… these five different personalities come together to create a youthful school life story— (Source: Day of the River)