Tramps Like Us Volume 1 by Yayoi Ogawa is quite entertaining and is aimed for older girls. The drawings are great and the story keeps the reader interested. I actually like both the main characters, Sumire Iwaya and Momo (Takeshi Gouda).
Sumire Iwaya is a 26-year-old career oriented woman who is tall and beautiful. She discovers one day that her boyfriend whom she planned to marry is cheating on her. He has an inferiority complex - he feels that since she is taller than him, more educated, and earns more, he cannot stay with her.
One night while walking home, Sumire sees a large box lying around. Wondering what this trash is doing there, she opens it to find a person inside. It turns out that he's alive and good-looking. She takes him to her apartment and for fun she tells him that he can stay with her only if he becomes her pet. He happily accepts. Sumire names him Momo, the name of her deceased dog.
Discover Momo's past. What will happen when Sumire's ex-lover appears at her workplace? Can Momo be kept a secret? Can Sumire handle a pet, a man, and work?