After a long absence, Cocoa heads to the mountains to visit her family at the urging of her sister Mocha, who sent her a letter asking her to come home soon. Her absence means her friends must stay in town for a week without her while Cocoa enjoys spending time with her loved ones. However, Chino, who sees Cocoa as a sister figure, wants to watch the fireworks at the upcoming festival with Cocoa and the rest of their friends. Despite missing her friends dearly, Cocoa decides to return early. The question is, will she make it back in time for the highlight of the festival?