August 1st is "Mahjong Day". On this day, Pai celebrates her birthday, so Nashiko throws a birthday party for her on the beach. The group enjoys a unique birthday party, eating birthday cake on the beach in the middle of the day and playing in the sea. Later, as the party approaches its final stage, Nashiko and the others decide to give Pai a gift. However, right away, Riche presents her with something too expensive to be a gift...
