PQ Angels

From StarryHeaven:
Peanut and Kyuuri are aliens who have just arrived on planet earth. Their mission? Find their missing queen! However, this is not easy considering how they have some evil menace pursuing them and the fact that they turn into cockroaches and can’t turn back without kissing a human male! They also have a lot to learn about the new planet they’re on, so it’s a bit difficult when they have to fight evil…

There are only four chapters that were ever published in this series, as Naoko dropped this project due to Kodansha losing her original manuscript.