Tomoya has got a job and started to live alone, and enjoys his life with Tomoyo. One day, Takafumi, Tomoyos younger brother, brings their fathers illegitimate child, Tomo, to their apartment. Tomoya and Tomoyo finally accept her. Also, just before summer holiday, Kanako, Takafumis ex-girlfriend, starts to live with them.... Their first and last summer holiday starts....