Rainbow and Black

College student Kuroe Shirahoshi feels like she's living in black and white, and she longs for more excitement... until a small, rainbow, incredibly weird bird-thing brings color to her life. Now they live together. Is this creature just a pet, or is it more like a roommate? Alternative title: Niji to Kuro; Rainbow and Black; Niji and Kuro; ニジとクロ