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.
Apparently, all you have to do 
is keep completing missions.
Anscheinend muss du nur Aufgaben erledigen.
Parece que tienes que 
completar unas misiones.
Por lo visto tienes que completar 
una serie de misiones.
Pour être franc,
Aparentemente tudo o que você tem que
fazer é completar algumas missões.