So first off, if you don't enjoy age gaps do not read this manga.
Now back in 2013 I picked this manga up with no real insight to what it was like except that it was by my favorite mangaka Arina Tanemura. I had hig hopes for this manga and it fell pretty short.
5/10 for story. Why? Neko to Watashi no Kinyoubi follows you're average shoujo heroine Ai. She's really average aside from her love of chocolate, which gets mentioned almost every chapter. It first makes out to be a girl in love with her senpai with the small twist, her cousin younger by
5 years, Nekota is also in love with her. It seems interesting and heck I was rooting for the senpai who is also in love with her but as the title suggests Neko(ta) is the main character and love interest. So yeah the eventually end up together even though they're cousins. I mean it's not that bad, right? Oh no, Nekota forces himself upon Ai on more than one occasion and keeps wanting to have sex with her even though he's 12. Also her other cousin forces himself on her and her other cousin loves her because shes a shoujo heroine literally named love. Yeah it's a kind of messy plot that makes me think Tanemura-sensei was doing this manga because she had to for income or something.
For the art I give it a 10 because yet again, Tanemura has succeeded in her beautiful style that has kept me captivated since I was a kid. Other than that theres not much to be said.
When it comes to the characters in this manga is where expectations aren't met. Arina Tanemura tries really hard to make heroins interesting, whether it be their tragic back story or their passion to move forward and overcome great obstacles coupled with tragic circumstances. This kind of heroine is what she succeeds at writing. Ai however doesn't have that. Ai is indecisive and a kind of boring character. Shes got no huge traits to offer shes just...really normal. And the relationship between her and Nekota can be cute at times but it can get really annoying. The side characters, Serizawa and Mosuko actually are a better couple and I would not be mad if this manga was about them instead.
Overall I give it an 6 for now. If this is you're cup of tea go ahead and read it and dont let this review stop you. In all fairness it could be worse.