The sixth installment of the series about the unrequited love between a big-breasted gal and a boring guy like me! A cute transfer student suddenly appears and approaches Toshio!? Yuina, who sees this, is filled with jealousy and anxiety... That day, Yuina is caught in a sudden rain shower and ends up taking shelter at Toshio's house. Yuina's heart is pounding with excitement in the situation of being alone with him...