Ep. 9: Professor Itsuki presenteia Kaoru e Aoi com uma viagem romântica ao mar para Yokohama

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Professor Itsuki is thankful for Kaoru's work in his institute and makes a present of two tickets for a sea trip to Yokohama. Professor Itsuki insists on taking his "girlfriend" there. However, since all of the female tenants except Aoi are away and busy, this is Kaoru's chance to finally spend time alone with Aoi. During this stay they check into a hotel and spend the night. On this night it seems these to lovebirds break all the boundaries. As it seems Kaoru and Aoi appear to have sex. (Source: Wikipedia)