Plot: It was a wonderful morning the Yokodera and Tsukiko went to school together while discussing their plans later than day for the school festival then suddenly a pink-haired little girl showed up, then it accrued that she was Ponta's little sister named Emi. Emi kept calling Yokodera onii-san (big brother) and seemed very friendly with him but at the same time Tsukiko seemed not to like Emi very much and had a feeling that she is a evil-plotted person,then she said that Yokodera should take Emi for a tour of their school and would wait for him afterward for their practices