Two and a half years after the previous work. Koma, who moved to Germany, returns to Japan for summer vacation. Her friend Noboru is invited for a short visit and was thrilled to see her again, but what appeared before him was a strange foreign girl.

Noboru the high school student, Koma the whimsical girl, and Hanna, a German girl who cannot speak Japanese.

A villa area surrounded by the sea, a midsummer impure cross-cultural exchange that takes place under one roof.