Wakuraban

From MangaHelpers:

To begin his college career, Mashiro Masuguchi begins his life alone at the apartment "Wakuraba." He finds himself excited and lonely at the same time at his new room, but the loneliness only lasts for a short time. He finds that his neighbors each have very colorful personalities and are, for the most part, extremely friendly. Mashiro begins his life as part of the Wakuraban family. [DrCoke]