Laura begins her first day in Aozora Middle School, where she finds herself enjoying some areas while struggling with other areas. Later on, Laura vents her frustration over struggling in some school subjects when Swim Club president Eiko Mizushima invites her over to her club, which Laura happily accepts. As Laura prepares to swim, Numeri, having been chosen by Butler to attack, summons a Zenzen Yaraneeda to attack the school's swimming pool forcing Manatsu and her friends to transform to engage the beast...