Kaguya, an alien who was cast down onto Earth as punishment, takes over the body of a high school girl and must learn to adapt to human society... but of all things to take interest in, these lowly life forms' "sexual reproduction" is what catches Kaguya's attention...
Kaguya, you Should Reflect on your Actions. is a completed manga by Migiwa Korumono, first published in 2018. It blends sci-fi and comedy. You can read all 12 available chapters of Kaguya, you Should Reflect on your Actions. online for free on MangaPulse; the newest is Chapter 11, added 2023-01-09. The series is finished, so you can read it from start to end in one go.