Angoru Moa ~Daiyogen no Ketsumatsu~

Hero was walking when he remembered not locking the door. When he came back, a girl was getting food from his fridge. She turned out to be Angolmois the Great King of Fear from the Great Prophecy! As he soon got to know, whenever girl got disappointed, large scale natural disasters started to happen, so he decided to keep the girl at home till she's taken away. He now has to live with her, make her happy and pray for long awaited pickup team to take Angolmois away.

[From vndbreview]