Kazue asks Meiko to help with the custom "Tale of Uojima Madoki" to interact with her relatives and acquaintances. Meiko helps a fish shop to get a lot of sea breams cheaply, and learns about fish while Genta is being fascinated by her doing. Kazue says that she will introduce Meiko to her relatives in greetings. However, Yutaro gets worried that there is something behind his sister's actions.. and Meiko gets in a big trouble!