Joni begins to secretly look after a guinea pig she found in the park as she has always wanted a pet. Meanwhile, she"s also responsible for taking care of some flowers for an observation project that she, Mia, Emilia, and Alex are conducting. In Joni’s already messy room, the guinea pig makes even more of a mess! What"s more, looking after the guinea pig causes Joni to neglect the flowers until they wilt and die! How will Joni clean up this mess?