There's no real story behind the game, just many short stories for each stage. The cute thing is that most are connected, like... after cleaning a stage some characters will talk with each other, or you can use the objecs left behing by the previous person that you played.
I feel that the motto of this game "Even on rainy days, it's a bit warm" really fits it, because it really warms up your heart!
Very funny and cute so I definitely recommend this game!!!