Looking for anime(or manga)??????? 10 points Helpppppppp?

I cant remeber this anime. its about a boy who lives in a house with a cat and dog. He shares it with a little girl. And another girl with long bluish hair. Another girl with red eyes/ white hair/with fangs. A galactic police officer crashs outside his front house. There is also a girl super genius living in the house. And a cat-bunny thingy with the boy (main character in the house). The cat transorms in to different things (human,ect.) There is romance.??????????????