Rin Mate is Aoyama's editor and friend from high school. Rin is strict when it comes to Aoyama and keeps a watch over her. She has no problem threatening to give Aoyama a hard time, should she approach the deadline and not be finished with her work yet.

The second season of Gochuumon wa Usagi Desu ka? 
 
It’s time to re-open the doors to Rabbit House, where good friends are ready to take on the next exciting adventure, and there’s always something unusual going on. After all, how many cafés have waitresses who collect firearms and a rabbit that actually talks? However, trouble may be burrowing into the Kafuu residence when a magazine runs an article on places to eat and neglects to mention Rabbit House! Will an investigation into what’s been “haunting” Syaro’s house be a wild goose chase, or will someone get a lot of grey hare as a result? Is the sudden appearance of Cocoa’s big sister a blessing or a disaster waiting happen? Still, nothing is as scary as the prospect of graduating school! Will everyone make the grade, or will some friends be left behind? 
 
(Source: Sentai Filmworks)

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The third season of Gochuumon wa Usagi desu ka? 
 
As summer turns to autumn, the colorful Rabbit House regulars return to serve up warm treats and tasty drinks at the Rabbit House café — along with a heaping helping of adorable antics and cute capers, of course! 
 
(Source: HIDIVE)

Lured in by the promise of cute bunnies, Cocoa stops by Rabbit House Café for a drink—only to find out it's the very place she'll be living…?! Inside, she meets small-but-aloof Chino, militaristic Rize, calm and traditional Chiyo, and Sharo, a normal girl who overflows with elegance. Watch the girls' friendship deepen as the café bursts with cuteness and laughter from all directions! 
 
(Source: Yes Press)

Cocoa visits her family, in the mountains, after quite some time again after her sister Mocha wrote her, through a letter, to come back soon. Her friends will have to spend a week in the town without her, while Cocoa has time with her family that she hasn't seen for a long time. But Chino, Cocoa's self proclaimed little sister, wants to go watch, with Cocoa and all her friends, the fireworks in the fireworks festival, which is coming up in less than a week. Cocoa decides to return early as she misses them all, but will she arrive in time for the climax of the festival? 
 
(Source: TMDB)