|S2 Episode 5 - With a Bite, I Could Discern It Was Commonly Springy|
Cocoa's sister, Mocha, gets distracted with a rabbit on her way to Rabbit House, and Cocoa goes out to look for her... Then Mocha meets Aoyama, and gets the idea to surprise Cocoa by disguising herself.
Rize and Chino think that this strange woman in a mask is a drug dealer, and it looks even worse when she criticizes Cocoa's bread and then opens a suitcase of white flour in order to show how real bread is made.
When Mocha properly introduces herself, she acts just like Cocoa and treats both Chino and Rize like her little sisters. Rize is very uncomfortable being hugged and cuddled like that.
Cocoa finally returns, and has the same idea as Mocha, and comes in with a disguise... Mocha sees right through it. It's so cute when Cocoa reverts to "little sister" mode for a second, and then goes and tries to show off how she's a big sister to Chino.