Akari Akaza, Chinatsu Yoshikawa, Kyouko Toshinou, and Yui Funami return to mark an exciting occasion! Although their initial celebration ideas were bizarre, they decide to host a party in their Amusement Club room. With assistance from Student Council friends, they begin preparations for the big day, planning a surprise for a special someone. Follow the girls as they collaborate to create an enjoyable and memorable party, interacting with each other through their cute and unique quirks.