Because of the last choice Kanade made, a mysterious girl named Chocolat came falling from the sky. It appears that Chocolat has something to do with the curse of Absolute Choice that anguishes Kanade, so he lets her live with him in his house. It's then that Kanade recieves a mission on his phone: to make his classmate, Yukihira Furano laugh. Considering the fact that she's cold, shows no emotion, and has a sharp tongue, this isn't an easy matter.
Because humans are sinful 
creatures that are
Menschen sind sündige Lebewesen,
Porque los humanos son criaturas 
pecadoras que son así
Los humanos son criaturas pecadoras
Parce que l’humain est
un pécheur qui sacrifie la vie
Porque