
If you're looking for manga similar to Rainbow and Black, you might like these titles.
Kotori was a normal girl who had always been tempted down the wrong path. As she lived her normal, boring, everyday life, trying so hard to follow her dreams, a bold chubby straw-bale cat walked into her life. Will this cat be a god of luck for her? Or will it become a god of misfortune, and lead Kotori down the wrong path...? A fluffy fat cat opens up the door on this story of a woman's struggles through everyday life!
At Amatera Chateau, the exclusive all-girls dormitory, lives Petit (a dog that's just been adopted), Hanazono Hana (a not-so-smart girl), Kataoka Hikari (who doesn't like dogs), and Yamada Constance (pretty smart). This is about how chaos unfolds in their lives.
Meet Riko, a twenty-nine-year-old office worker with an obsession with video games. Her coworkers can’t quite figure her out—she never talks about her personal life, she never works overtime, and she never joins them for happy hour. Is she antisocial? Nope, she’s rushing home to play video games alone. That is until a stray cat is found in the office parking lot and ends up coming home with her! Having no experience with pets, Riko uses lessons drawn from video games to guide her in cat care, while her cute companion tries to understand her behavior through a cat's worldview.