Cocoa leaves for a week and everyone immediately realizes the coffee shop stops being a home the moment she's gone. The whole OVA is just them figuring out how to get her back in time for fireworks, which sounds simple until you realize it's actually about how these girls have become each other's gravity. A comfort show that knows its real power isn't the jokes or the aesthetics, it's that you're watching a found family accidentally prove they can't function without each other.

Cocoa travels home to the mountains after her sister Mocha writes to ask her to return soon, and she spends time with family she has not seen in ages. Her friends must get through a week in town without her. Meanwhile Chino, who calls herself Cocoa's little sister, hopes to see the fireworks at the festival less than a week away with Cocoa and everyone else. Missing her friends, Cocoa decides to go back early, but can she arrive before the festival's climax? The single OVA episode is a gentle comedy with a slice-of-life feel.