Due to Sana and Nanaka's work as classroom representatives, their sensei, Yuzuki Fujimura frequently gives them caramels, causing Sana to remember an incident in a youth when a younger Yuzuki gave him a caramel. Meanwhile, Shuri attempts to gather signatures for a project to stop the building of a new town hall over the nature center. The school's administration forbids Shuri to continue. At her home, her father, the one who proposed the construction, angrily berates Shuri, who flees home...