Manga by author Kaneko Aru - Status ongoing

Seira, (Real Name: Herami Fukasera) is an approval-seeking girl (26 years old) who works at a maid cafe. Her younger sister, Kira, is an idol (19 years old) who is rapidly gaining popularity with her cool, and mature character. However, the real Kira only ever think of her sister and tries to cheer her up in every possible way to help her sister with her mental health and anxiety

A new and exciting law of the jungle comedy about Kopeko, an unknown creature, and Ef, her intended foodstuff.Kopeko, a creature kept segregated in a mysterious facility, has lived a life of daily feeding. All of a sudden, a girl named Ef is brought before her. Kopeko is bewildered by the sudden change in her environment, but realizing Ef is to be her prey, she pounces...!?