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It's a new school day and Nana and her friend Narumi are messing about with their frogs. When Kouichi arrives with Mao, Nana uses this as a chance to invite Mao to welcoming party. With Nana, Mao, Narumi, Kazuki and Kouichi planning to go all they need are 2 more people, so it's all up to Kazuki and Kouichi to invite someone each.