Nobue is a female college student in a junior college, and her sister Chika is an ordinary elementary school student. But these ordinary days are always full of troubles. The problem is that Chika's classmate and neighbor Miyu is an out-and-out trouble maker. Miyu often jumps into Chika's room from the window and becomes a member of this family. Chika's friend Jasmine is a timid and cute girl. One day, a foreign girl named Anna transfers to her class. In fact, Anna is a girl who is completely Japanese in her heart, and this secret is accidentally discovered by Jasmine. The five women finally gathered under the same roof. While the cold jokes are constantly coming out, Miyu's antics make people laugh and cry. The happy and comfortable life comedy begins.