Susumu Yamada is Japanese, but had never lived in Japan due to his father's international line of work but has now seemingly settled down in Los Angeles, USA. But when Sukumu flunks out of school his parents convince him to go to Japan and stay in his uncle's apartment at the western style residence "Rosemary Hotel". Instead Sukumu arrives at a shabby run down building resided by an eccentric cast. A pair of detectives, a spoiled girl who keeps a literary genius as a servant, and a trio of poor day laborers. During his stay Sukumu and the other residents solve a mystery from the past, have an otherworldly encounter, and much more

Included one-shots: Volume 4: Yamada-ke no Haha, Jiman no Koibito