Koisuru Asteroid (恋する小惑星〈アストロイド〉, Love of Asteroid〈ASTEROID) (also known as "Asteroid in Love" and sometimes abbreviated as "KoiAs") is a Japanese manga series written and illustrated by Quro. The manga is published by Houbunsha and is serialized in Manga Time Kirara Carat since March 2017. A 12-episode anime adaptation by Doga Kobo premiered on January 3, 2020 and ran until March 27, 2020.
When she was little, Mira Kinohata met a boy named Ao at a campsite in town. While gazing at the starry sky together, Mira learns that there's a star with the same name as herself, but no star named Ao. The two then promised to one day explore asteroids together and find a star to name it after him.
Several years later, Mira enrolls at the Hoshizaki high school and decides to join the astronomy club to fulfill her promise. However, she learns that the astronomy club will be merged with the geological research society to form the earth science club. Reluctantly, Mira goes to the club room and is reunited with Ao Manaka—the person she made the promise to explore asteroids with—and is shocked to learn that she is a girl!
- Official anime website (in Japanese)