The Tropical Club decides to hold a sand art competition with the other clubs at Aozora Middle School. However, just as the sand arts are about to be finished, it starts to rain. Manatsu tries her best to protect everyone's work but...
Las chicas preparan un nuevo evento en el club con el que esperan atraer a mucha gente. Y se les ocurre hacer una competencia de figuras de arena.
O Clube Tropical decide organizar o seu primeiro evento escolar, o Concurso Interclubes de Arte na Areia da Escola Aozora!