Josephine is a cat owned by Nagi. He is dressed up in an elegant manner, and speaks in a Kansai dialect. He wishes for Nagi to shed her masculine behavior, and thus asks Junpei to help her fall in love once more.

Junpei Kousaka is a second-year high school student who despises cats and has an allergy to them. It just so happens that his high school crush is Kaede Mizuno, a girl who adores cats. One day, while walking home from school, Junpei kicks an empty can and unfortunately beans the local neko-jizou-sama (guardian deity of cats). He finds he can now understand what cats are saying, including his family's own ill-tempered cat, Nyamusas. However, if he does not grant 100 wishes from cats, he will turn into a cat himself.
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(Source: Anime News Network)

He was married to voice actor [Kanako Mitsuhashi](https://anilist.co/staff/95546/Kanako-Mitsuhashi) but they divorced on June 2012. 

Non-anime roles:
- Baizhu (Genshin Impact)
- Roland (Punishing: Gray Raven)
- Waruido Spindo (Bakuage Sentai Boonboomger)

The hapless hero of Nyankoi! is Junpei Kosaka, a guy who not only hates cats, he's deathly allergic to them. So it's kind of bummer that he has a crush on a classmate who adores kitties, and things go from bad to worse when he accidentally angers a guardian deity of cats who bestows upon him a gift and a curse. He can now understand what cats say, but he must grant 100 wishes from cats or he'll be turned into a cat himself!<br><br>
(Source: CMX)