It's a peaceful day like any other in the cafe Rainy Color.
Suddenly, the silence is broken when a girl kicks down the door.
Her name is Amami Yoko, and she's the daughter of the cafe's owner, Amami Koji.

"At least keep your promise, you old bastard!"

The target of her ire and the cause of all the ruckus is Amami Koji himself.
When she learns that not only did he blow off their trip, he's also planning to go to Hawaii by himself, Yoko's rage only grows.

Just then, she catches sight of Rainy Color's mascot dog, Rain, and freezes.
It turns out that she's afraid of dogs!

She immediately panics and starts to run away, but she ends up heading for the suitcase Koji's packing and...Crash!
She trips over the suitcase, topples over, and shatters a vase that Koji was keeping nearby.

As punishment for breaking the vase, Yoko is forced to stand in as Rainy Color's manager for summer vacation.
A heartwarming and relaxing story depicting Yoko's struggles, as well as what people can do for others, is about to begin!

[Source: Crunchyroll]