Souta's big sister Rinko walks in on Souta, Poco, and Nakajima fast asleep after their fishing trip. Souta is frantic to stop Rinko from prying about Poco, but he’s not the only nervous one—Rinko says she's bad with kids, and Poco’s afraid of her. But on Rinko's suggestion, Souta and Poco join her on an outing to Yashima. At the tanuki-connected Yashima Temple, they pray with the pilgrims and enjoy a stroll. And while walking with Poco, the siblings find themselves reminiscing about one old memory after another...