There is a mysterious house; house,which moves freely in space and time. In this house live / travel three sisters - Ai, Mai, and Mii. They travel in search of a mysterious person who can explain the meaning of this obscure wanderings in time. Moreover, it is not recommended to leave the confines of the house. Sojourn sisters are not alone -they are constantly accompanied by some mysterious maid (non-resident of the bodyguard), has any relevance to the purpose of their search, and cute animal (hamster type), which can turn into a kawaii girl. Frankly, hentai roots of the series is very pronounced in the first series - "fanservisa" here - though the export BelAZ`ami.