The Emperor and I

The Emperor and I (エンペラーといっしょ, Emporer to Issho) is a full-color manga by mato. It began its serialization on the Shonen Jump+ website October 28, 2015, and ended July 12, 2017. It is complete in four volumes. Viz Media serialized the chapters in its free section, and has released the volumes digitally.

Plot
One day something emerges from high school girl Kaho’s refrigerator—an emperor penguin, the largest of all penguins! When this emperor joins the household, fun and wacky antics with family and friends ensue!

Official
Official English site