kimi wa petto be a cute story about a girl who one day find a boy inside a box that be outside her apartment one day . she decide to bring him in and fix his cut . she then leave a note for him to eat some food she make then go home because she have to go to work . when she get home however she find that he be still there . he tell her that he want to live there with her like a brother or cousin . in desperation to get him to leave she tell him that if he become her pet then he could stay . and a a pet she say that he would have no right and do whatever she tell him . ( not in that perverted way . ) to her surprise he agree and from then on he be know a momo and her pet .