Takeru Amato has just moved to Akihabara and found himself a house with cheap rent, but it has one particular imperfection: a strange hole in the living room floor.

More and more Eto-shin girls have appeared from the hole in the living room, posing a threat to the peace and quiet of Takeru's life.

Nya-tan and Uri-tan have made new homes for themselves on Takeru's property, and the three of them go shopping for new furniture.

Having been saved by Uri-tan, Nya-tan returns to the maid café Eto, where Usa-tan criticizes her character.

Takeru is stuck in bed sick, and the sheep Eto-shin, Mei-tan, determines that what he has is no ordinary cold.

Nya-tan tries to find some way to get Sol/Lull Seals without effort, and her master Shima-tan catches her trying to bribe Inu-tan and Key-tan with their favorite treats.